LONDON -- His newborn son is "a little bit of a rascal'' and car seats can daunt any dad, Britain's Prince William says.

The second in line to the British throne has described his joy at introducing his son to the world on the steps of a London hospital last month -- and about his nerves over fitting the car seat securely into the Land Rover before driving off.

William told CNN in his first interview since Prince George's birth on July 22 that both he and the Duchess of Cambridge couldn't wait to show off their son when they emerged from St. Mary's Hospital to meet the world's media a day later.

"I'm just glad he wasn't screaming his head off the whole way through,'' he said in an interview broadcast Monday.

Story continues below slideshow

Loading Slideshow...
  • Kate Middleton And Prince William Show Newborn Son

    The Duke and the Duchess of Cambridge, leave The Lindo Wing of St. Mary's Hospital, in London, Tuesday, July 23, 2013, carrying their new born son, the Prince of Cambridge, who was born on Monday. into public view for the first time.

  • Kate Middleton And Prince William Show Newborn Son

    The Duke and the Duchess of Cambridge, leave The Lindo Wing of St. Mary's Hospital, in London, Tuesday, July 23, 2013, carrying their new born son, the Prince of Cambridge, who was born on Monday. into public view for the first time.

  • Kate Middleton And Prince William Show Newborn Son

    The Duke and the Duchess of Cambridge, leave The Lindo Wing of St. Mary's Hospital, in London, Tuesday, July 23, 2013, carrying their new born son, the Prince of Cambridge, who was born on Monday. into public view for the first time.

  • Kate Middleton And Prince William Show Newborn Son

    The Duke and the Duchess of Cambridge, leave The Lindo Wing of St. Mary's Hospital, in London, Tuesday, July 23, 2013, carrying their new born son, the Prince of Cambridge, who was born on Monday. into public view for the first time.

  • Kate Middleton And Prince William Show Newborn Son

    The Duke and the Duchess of Cambridge, leave The Lindo Wing of St. Mary's Hospital, in London, Tuesday, July 23, 2013, carrying their new born son, the Prince of Cambridge, who was born on Monday. into public view for the first time.

  • Kate Middleton And Prince William Show Newborn Son

    The Duke and the Duchess of Cambridge, leave The Lindo Wing of St. Mary's Hospital, in London, Tuesday, July 23, 2013, carrying their new born son, the Prince of Cambridge, who was born on Monday. into public view for the first time.

  • Kate Middleton And Prince William Show Newborn Son

    The Duke and the Duchess of Cambridge, leave The Lindo Wing of St. Mary's Hospital, in London, Tuesday, July 23, 2013, carrying their new born son, the Prince of Cambridge, who was born on Monday. into public view for the first time.

  • Kate Middleton And Prince William Show Newborn Son

    The Duke and the Duchess of Cambridge, leave The Lindo Wing of St. Mary's Hospital, in London, Tuesday, July 23, 2013, carrying their new born son, the Prince of Cambridge, who was born on Monday. into public view for the first time.

  • Kate Middleton And Prince William Show Newborn Son

    The Duke and the Duchess of Cambridge, leave The Lindo Wing of St. Mary's Hospital, in London, Tuesday, July 23, 2013, carrying their new born son, the Prince of Cambridge, who was born on Monday. into public view for the first time.

  • Kate Middleton And Prince William Show Newborn Son

    The Duke and the Duchess of Cambridge, leave The Lindo Wing of St. Mary's Hospital, in London, Tuesday, July 23, 2013, carrying their new born son, the Prince of Cambridge, who was born on Monday. into public view for the first time.

  • Kate Middleton And Prince William Show Newborn Son

    The Duke and the Duchess of Cambridge, leave The Lindo Wing of St. Mary's Hospital, in London, Tuesday, July 23, 2013, carrying their new born son, the Prince of Cambridge, who was born on Monday. into public view for the first time.

  • Kate Middleton And Prince William Show Newborn Son

    The Duke and the Duchess of Cambridge, leave The Lindo Wing of St. Mary's Hospital, in London, Tuesday, July 23, 2013, carrying their new born son, the Prince of Cambridge, who was born on Monday. into public view for the first time.

  • Kate Middleton And Prince William Show Newborn Son

  • Kate Middleton And Prince William Show Newborn Son

    The Duke and the Duchess of Cambridge, leave The Lindo Wing of St. Mary's Hospital, in London, Tuesday, July 23, 2013, carrying their new born son, the Prince of Cambridge, who was born on Monday. into public view for the first time. (AP Photo/John Stillwell, Pool)

  • Kate Middleton And Prince William Show Newborn Son

    Kate, Duchess of Cambridge holds the Prince of Cambridge, Tuesday July 23, 2013, as they pose for photographers outside St. Mary's Hospital exclusive Lindo Wing in London where the Duchess gave birth on Monday July 22. The Royal couple are expected to head to London’s Kensington Palace from the hospital with their newly born son, the third in line to the British throne. (AP Photo/Alastair Grant)

  • Kate Middleton And Prince William Show Newborn Son

    The Duke and the Duchess of Cambridge, leave The Lindo Wing of St. Mary's Hospital, in London, Tuesday, July 23, 2013, carrying their new born son, the Prince of Cambridge, who was born on Monday. into public view for the first time.

  • Kate Middleton And Prince William Show Newborn Son

    The Duke and the Duchess of Cambridge, leave The Lindo Wing of St. Mary's Hospital, in London, Tuesday, July 23, 2013, carrying their new born son, the Prince of Cambridge, who was born on Monday. into public view for the first time.

  • Kate Middleton And Prince William Show Newborn Son

    The Duke and the Duchess of Cambridge, leave The Lindo Wing of St. Mary's Hospital, in London, Tuesday, July 23, 2013, carrying their new born son, the Prince of Cambridge, who was born on Monday. into public view for the first time.

  • Kate Middleton And Prince William Show Newborn Son

    Prince William, Duke of Cambridge and Catherine, Duchess of Cambridge leave the Lindo Wing of St Mary's Hospital with their newborn son on July 23, 2013 in London, England. The Duchess of Cambridge yesterday gave birth to a boy at 16.24 BST and weighing 8lb 6oz, with Prince William at her side. The baby, as yet unnamed, is third in line to the throne and becomes the Prince of Cambridge. (Photo by Oli Scarff/Getty Images)

  • Kate Middleton And Prince William Show Newborn Son

    Prince William, Duke of Cambridge and Catherine, Duchess of Cambridge, depart The Lindo Wing with their newborn son at St Mary's Hospital on July 23, 2013 in London, England. The Duchess of Cambridge yesterday gave birth to a boy at 16.24 BST and weighing 8lb 6oz, with Prince William at her side. The baby, as yet unnamed, is third in line to the throne and becomes the Prince of Cambridge.  (Photo by Peter Macdiarmid/Getty Images)

  • Kate Middleton And Prince William Show Newborn Son

    Prince William, Duke of Cambridge and Catherine, Duchess of Cambridge, depart The Lindo Wing with their newborn son at St Mary's Hospital on July 23, 2013 in London, England. The Duchess of Cambridge yesterday gave birth to a boy at 16.24 BST and weighing 8lb 6oz, with Prince William at her side. The baby, as yet unnamed, is third in line to the throne and becomes the Prince of Cambridge.  (Photo by Peter Macdiarmid/Getty Images)

  • Kate Middleton And Prince William Show Newborn Son

    Prince William, Duke of Cambridge and Catherine, Duchess of Cambridge leave the Lindo Wing of St Mary's Hospital with their newborn son on July 23, 2013 in London, England. The Duchess of Cambridge yesterday gave birth to a boy at 16.24 BST and weighing 8lb 6oz, with Prince William at her side. The baby, as yet unnamed, is third in line to the throne and becomes the Prince of Cambridge. (Photo by Oli Scarff/Getty Images)

  • Kate Middleton And Prince William Show Newborn Son

    Prince William, Duke of Cambridge and Catherine, Duchess of Cambridge leave the Lindo Wing of St Mary's Hospital with their newborn son on July 23, 2013 in London, England. The Duchess of Cambridge yesterday gave birth to a boy at 16.24 BST and weighing 8lb 6oz, with Prince William at her side. The baby, as yet unnamed, is third in line to the throne and becomes the Prince of Cambridge. (Photo by Oli Scarff/Getty Images)

  • Kate Middleton And Prince William Show Newborn Son

    Prince William, Duke of Cambridge leaves the Lindo Wing of St Mary's Hospital with his newborn son on July 23, 2013 in London, England. The Duchess of Cambridge yesterday gave birth to a boy at 16.24 BST and weighing 8lb 6oz, with Prince William at her side. The baby, as yet unnamed, is third in line to the throne and becomes the Prince of Cambridge. (Photo by Oli Scarff/Getty Images)

  • Kate Middleton And Prince William Show Newborn Son

    Catherine, the Duchess of Cambridge (L) looks on as Prince William the Duke of Cambridge holds his new-born baby boy in front of the world's media outside the Lindo Wing of St Mary's Hospital in London on July 23, 2013. The baby was born on Monday afternoon weighing eight pounds six ounces (3.8 kilogrammes). The baby, titled His Royal Highness, Prince (name) of Cambridge, is directly in line to inherit the throne after Charles, Queen Elizabeth II's eldest son and heir, and his eldest son William.

  • Kate Middleton And Prince William Show Newborn Son

    Prince William, Duke of Cambridge and Catherine, Duchess of Cambridge leave the Lindo Wing of St Mary's Hospital with their newborn son on July 23, 2013 in London, England. The Duchess of Cambridge yesterday gave birth to a boy at 16.24 BST and weighing 8lb 6oz, with Prince William at her side. The baby, as yet unnamed, is third in line to the throne and becomes the Prince of Cambridge. (Photo by Oli Scarff/Getty Images)

  • Kate Middleton And Prince William Show Newborn Son

    Prince William, Duke of Cambridge and Catherine, Duchess of Cambridge leave the Lindo Wing of St Mary's Hospital with their newborn son on July 23, 2013 in London, England. The Duchess of Cambridge yesterday gave birth to a boy at 16.24 BST and weighing 8lb 6oz, with Prince William at her side. The baby, as yet unnamed, is third in line to the throne and becomes the Prince of Cambridge. (Photo by Oli Scarff/Getty Images)

  • Kate Middleton And Prince William Show Newborn Son

    Prince William and Catherine, Duchess of Cambridge show their new-born baby boy to the world's media outside the Lindo Wing of St Mary's Hospital in London on July 23, 2013. The baby was born on Monday afternoon weighing eight pounds six ounces (3.8 kilogrammes). The baby, titled His Royal Highness, Prince (name) of Cambridge, is directly in line to inherit the throne after Charles, Queen Elizabeth II's eldest son and heir, and his eldest son William.

  • Kate Middleton And Prince William Show Newborn Son

    Prince William and Catherine, Duchess of Cambridge show their new-born baby boy to the world's media outside the Lindo Wing of St Mary's Hospital in London on July 23, 2013. The baby was born on Monday afternoon weighing eight pounds six ounces (3.8 kilogrammes). The baby, titled His Royal Highness, Prince (name) of Cambridge, is directly in line to inherit the throne after Charles, Queen Elizabeth II's eldest son and heir, and his eldest son William.

  • Kate Middleton And Prince William Show Newborn Son

    Catherine, Duchess of Cambridge leaves the Lindo Wing of St Mary's Hospital with her newborn son on July 23, 2013 in London, England. The Duchess of Cambridge yesterday gave birth to a boy at 16.24 BST and weighing 8lb 6oz, with Prince William at her side. The baby, as yet unnamed, is third in line to the throne and becomes the Prince of Cambridge. (Photo by Oli Scarff/Getty Images)

  • Kate Middleton And Prince William Show Newborn Son

    Prince William takes the baby from Catherine, Duchess of Cambridge as they show their new-born baby boy to the world's media outside the Lindo Wing of St Mary's Hospital in London on July 23, 2013. The baby was born on Monday afternoon weighing eight pounds six ounces (3.8 kilogrammes). The baby, titled His Royal Highness, Prince (name) of Cambridge, is directly in line to inherit the throne after Charles, Queen Elizabeth II's eldest son and heir, and his eldest son William.

  • Kate Middleton And Prince William Show Newborn Son

    Prince William, Duke of Cambridge and Catherine, Duchess of Cambridge depart The Lindo Wing with their newborn son at St Mary's Hospital on July 23, 2013 in London, England. The Duchess of Cambridge yesterday gave birth to a boy at 16.24 BST and weighing 8lb 6oz, with Prince William at her side. The baby, as yet unnamed, is third in line to the throne and becomes the Prince of Cambridge. (Photo by Chris Jackson/Getty Images)

  • Kate Middleton And Prince William Show Newborn Son

    Prince William, Duke of Cambridge and Catherine, Duchess of Cambridge hold their newborn son outside The Lindo Wing at St Mary's Hospital on July 23, 2013 in London, England. The Duchess of Cambridge yesterday gave birth to a boy at 16.24 BST and weighing 8lb 6oz, with Prince William at her side. The baby, as yet unnamed, is third in line to the throne and becomes the Prince of Cambridge.  (Photo by Peter Macdiarmid/Getty Images)

  • Kate Middleton And Prince William Show Newborn Son

    Prince William, Duke of Cambridge and Catherine, Duchess of Cambridge, depart The Lindo Wing with their newborn son at St Mary's Hospital on July 23, 2013 in London, England. The Duchess of Cambridge yesterday gave birth to a boy at 16.24 BST and weighing 8lb 6oz, with Prince William at her side. The baby, as yet unnamed, is third in line to the throne and becomes the Prince of Cambridge. (Photo by Scott Heavey/Getty Images)

  • Kate Middleton And Prince William Show Newborn Son

    Prince William and Catherine, Duchess of Cambridge show their new-born baby boy to the world's media outside the Lindo Wing of St Mary's Hospital in London on July 23, 2013. The baby was born on Monday afternoon weighing eight pounds six ounces (3.8 kilogrammes). The baby, titled His Royal Highness, Prince (name) of Cambridge, is directly in line to inherit the throne after Charles, Queen Elizabeth II's eldest son and heir, and his eldest son William.

  • Kate Middleton And Prince William Show Newborn Son

    Prince William, Duke of Cambridge and Catherine, Duchess of Cambridge, depart The Lindo Wing with their newborn son at St Mary's Hospital on July 23, 2013 in London, England. The Duchess of Cambridge yesterday gave birth to a boy at 16.24 BST and weighing 8lb 6oz, with Prince William at her side. The baby, as yet unnamed, is third in line to the throne and becomes the Prince of Cambridge. (Photo by Oli Scarff/Getty Images)

  • Kate Middleton And Prince William Show Newborn Son

    The Duke and the Duchess of Cambridge, leave The Lindo Wing of St. Mary's Hospital, in London, Tuesday, July 23, 2013, carrying their new born son, the Prince of Cambridge, who was born on Monday. into public view for the first time.

  • NEXT: The World Celebrates The Royal Baby

  • The CN Tower is lighted blue to celebrate the birth of the royal baby, on Monday July 22, 2013, in Toronto. (AP Photo/The Canadian Press, Frank Gunn)

  • Lightning strikes behind The London Eye in central London which is lighted up in the national colors of red, white and blue to mark the birth of Prince William and his wife Kate's first child Tuesday, July 23, 2013. (AP Photo/PA, Lewis Whyld) UNITED KINGDOM OUT, NO SALES, NO ARCHIVES

  • NIAGARA FALLS, NY - JULY 22: Visitors to Niagara Falls receive notice of the sex of the royal baby indicated by the blue light illuminating the falls in Niagara Falls, New York. The Royal couple,The Duke and Duchess of Cambridge, had a baby boy who was born at 16.24 BST and weighed 8 pounds, 6 ounces. The child, who is now third in line to the throne, has yet to be named. (Photo by John Normile/Getty Images)

  • A man reads a newspaper carrying front page news of the birth of a baby boy of Prince William and Kate, Duchess of Cambridge, outside Buckingham Palace in London, Tuesday, July 23, 2013. (AP Photo/Sang Tan)

  • Indian 'dabbawallahs' - lunchbox deliverymen - feed sweets to each other in Mumbai on July 23, 2013, as they celebrate the newborn son of Britain's Prince William and Catherine, Duchess of Cambridge. The world on July 23 awaited the first glimpse of the still unnamed new heir to the British throne after Prince William's wife Kate gave birth to a strapping baby boy. AFP PHOTO/ INDRANIL MUKHERJEE (Photo credit should read INDRANIL MUKHERJEE/AFP/Getty Images)

  • Indian painter, Jagjot Singh Rubal touches up his painting of the Duke and Duchess of Cambridge with their newborn baby which he plans to post to them as a gift, in Amritsar on July 23, 2013. The world awaited the first glimpse of the still unnamed new heir to the British throne after Prince William's wife Kate gave birth to a healthy boy weighing eight pounds six ounces (3.8 kilogrammes), at St Mary's Hospital in London on July 22, 2013. AFP PHOTO/NARINDER NANU (Photo credit should read NARINDER NANU/AFP/Getty Images)

  • British newspapers carrying front page news of the birth of a baby boy of Prince William and Kate, Duchess of Cambridge are seen on display for sale at a newsagent in central London, Tuesday, July 23, 2013. (AP Photo/Sang Tan)

  • LONDON, ENGLAND - JULY 23: A bookmaker shows the odds on names for Catherine, Duchess Of Cambridge's newborn son at St Mary's Hospital on July 23, 2013 in London, England. The Duchess of Cambridge yesterday gave birth to a boy at 16.24 BST and weighing 8lb 6oz, with Prince William at her side. The baby, as yet unnamed, is third in line to the throne and becomes the Prince of Cambridge. (Photo by Peter Macdiarmid/Getty Images)

  • LONDON, ENGLAND - JULY 23: Well wishers wearing free yellow sunglass distributed by a drinks company wait for a glimps of The Duke and Duchess of Cambridge and their newborn son at St Mary's Hospital on July 23, 2013 in London, England. The Duchess of Cambridge has given birth to a baby boy yesterday at 16.24 BST, with William the Duke of Cambridge present for the arrival. (Photo by Peter Macdiarmid/Getty Images)

  • LONDON, ENGLAND - JULY 23: The Chelsea pensioner's stand with a teddy-bear called 'Charles' which they are sending as a present to the hospital to celebrate the birth of the royal baby at the Royal Hospital Chelsea on July 23, 2013 in London, England. The Duchess of Cambridge yesterday gave birth to a boy at 16.24 BST and weighing 8 lb 6oz, with Prince William at her side. The baby, as yet unnamed, is third in line to the throne and becomes the Prince of Cambridge. (Photo by Jordan Mansfield/Getty Images)

  • LONDON, ENGLAND - JULY 23: Members of the public gather outside Buckingham Palace to read the easel displaying the announcement of the birth of a son to The Duke and Duchess of Cambridge on July 23, 2013 in London, England. The Duchess of Cambridge has given birth to a baby boy yesterday at 16.24 BST. (Photo by Dan Dennison/Getty Images)

  • SANTA MONICA, CA - JULY 22: Karen Milne, (L) from Scotland, wears a mask representing Catherine, Duchess of Cambridge, as she and her friends Rachelle Rodriguez (C) and Michelle Lewis (R) celebrate the royal birth announcement at Ye Olde King's Head English Pub July 22, 2013 in Santa Monica, California. The Royal couple had a baby boy who was born at 16.24 BST and weighed 8 pounds, 6 ounces. The child, who is now third in line to the throne, has yet to be named. (Photo by Kevork Djansezian/Getty Images)

  • LONDON, ENGLAND - JULY 23: A woman wears Union flag glasses and hat as she waits for Catherine, Duchess Of Cambridge and her newborn son at St Mary's Hospital on July 23, 2013 in London, England. The Duchess of Cambridge yesterday gave birth to a boy at 16.24 BST and weighing 8lb 6oz, with Prince William at her side. The baby, as yet unnamed, is third in line to the throne and becomes the Prince of Cambridge. (Photo by Peter Macdiarmid/Getty Images)

William was quizzed on a range of child-rearing topics -- from baby toys to diapers and sleep deprivation -- and acknowledged that his expert performance sliding his child's car seat into the back of the royal four-wheel drive was a well-drilled exercise.

"Believe me, it wasn't my first time. And I know there's been speculation about that. I had to practice, I really did,'' he said.

William and his wife's assured, do-it-yourself performance in front of the hospital helped cement the couple's image as the modern face of Britain's monarchy. But William said the decision to take his own baby in hand and drive home in the glare of the international press was a way of establishing his independence.

"I very much feel if I can do it myself, I want to do it myself,'' he said. "And there are times where you can't do it yourself and the system takes over or it's appropriate to do things differently. But, I think driving your son and your wife away from hospital was really important to me.''

As for the nearly 1-month-old baby, William referred to him as "a little bit of a rascal'' who he said reminded him of his younger brother, Prince Harry.

Striking a slightly exasperated tone familiar to many new fathers, he said he wished Prince George would settle down a little.

"At the moment, the only legacy I want to pass on to him is to sleep more and maybe not have to change his nappy so many times.''

The interview is part of a one-hour CNN documentary, ``Prince William's Passion: New Hope, New Father,'' due to air on Sept. 15.

Related on HuffPost: