UPDATE: Did Kate Middleton let it slip that she and Prince William are having a daughter? Perhaps not, according to a video recently shown by the Daily Mail. The footage suggests Middleton said “'Is this for us, awww, thank you so much” when receiving a gift from a well-wisher, not “I'll take that for my d..."

It looks like we may have to wait for confirmation from Kate herself before we can know the baby’s sex for sure.

Are Kate Middleton and Prince William expecting a baby girl!?

According to several sources, that appears to be the case.

US Weekly is reporting the Duchess of Cambridge was caught almost mentioning the gender of the Royal baby to a well-wisher on her recent trip to Grimsby. (Check out what Ms. Middleton wore to the event here.) The person in question is reportedly, Diane Burton, and after handing Kate a teddy bear, the Royal is reported to have said, "Thank you, I'll take that for my d..." before catching herself and trailing off.

The U.K. outlet The Mirror even has a voice recording of the exchange.

Other news organizations, like E!, are reporting several people who witnessed the almost-slip-up questioned Middleton on whether she meant to say daughter. Her coy response was consistently, "We don't know..." the baby's gender.

The catch is, last week, a source confirmed to US Weekly that the Duke and Duchess of Cambridge have learned the sex of their baby.

And along the Royal baby watch way, there have been several hints that Kate is indeed having a girl, says the Daily Mail. Everything from her extreme morning sickness (hyperemesis gravidarum) to her slight weight gain could be indicators she's carrying a future princess.

If this report is confirmed, this could be big news for the Royal family. Queen Elizabeth II recently took steps to ensure Kate and Will's daughter will be called a princess (and her Royal Highness) by overruling centuries of royal gender discrimination in the Succession to the Crown Bill.

LOOK: See What Kate Wore On Her Recent Trip To Grimsby

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  • Britain's Kate, The Duchess of Cambridge, receives flowers from children during her visit to Humberside Fire and Rescue Service, in Grimsby, Tuesday, March 5, 2013. The Duchess was visiting The Prince’s Trust Team program  which is a 12-week personal development scheme, which helps unemployed 16-25 year olds build the skills and confidence they need to get a job. (AP Photo/Scott Heppell)

  • Britain's Kate, the Duchess of Cambridge, waves during her visit to Humberside Fire and Rescue Service, in Grimsby, England, Tuesday, March 5, 2013. The Duchess was visiting The Prince’s Trust Team programme  a 12-week personal development scheme which helps unemployed 16-25 year olds build the skills and confidence they need to get a job. (AP Photo/Scott Heppell)

  • Britain's Kate, The Duchess of Cambridge, receives flowers from children during her visit to Humberside Fire and Rescue Service, in Grimsby, Tuesday, March 5, 2013. The Duchess was visiting The Prince’s Trust Team programme  which is a 12-week personal development scheme, which helps unemployed 16-25 year olds build the skills and confidence they need to get a job. (AP Photo/Scott Heppell)

  • Britain's Kate, The Duchess of Cambridge,gestures during her visit to Humberside Fire and Rescue Service, in Grimsby, northern England Tuesday, March 5, 2013. The Duchess was visiting The Prince’s Trust Team programme  which is a 12-week personal development scheme, which helps unemployed 16-25 year olds build the skills and confidence they need to get a job. (AP Photo/Scott Heppell)

  • Britain's Kate, The Duchess of Cambridge, is seen during her visit to Humberside Fire and Rescue Service, in Grimsby, Tuesday, March 5, 2013. The Duchess was visiting The Prince’s Trust Team programme  which is a 12-week personal development scheme, which helps unemployed 16-25 year olds build the skills and confidence they need to get a job. (AP Photo/Scott Heppell)

  • Britain's Kate, The Duchess of Cambridge, waves during her visit to Humberside Fire and Rescue Service, in Grimsby, Tuesday, March 5, 2013. The Duchess was visiting The Prince’s Trust Team programme  which is a 12-week personal development scheme, which helps unemployed 16-25 year olds build the skills and confidence they need to get a job. (AP Photo/Scott Heppell)

  • Britain's Kate, The Duchess of Cambridge, during her visit to Humberside Fire and Rescue Service, in Grimsby, Tuesday, March 5, 2013. The Duchess was visiting The Prince’s Trust Team programme  which is a 12-week personal development scheme, which helps unemployed 16-25 year olds build the skills and confidence they need to get a job. (AP Photo/Scott Heppell)

  • Royal visit to Grimsby

    The Duchess of Cambridge sits next to a dummy of the Ship's Mate at the Skipper's Table on display during her tour of the National Fishing Heritage Centre, Grimsby.

  • Britain's Kate, The Duchess of Cambridge, gestures during her visit to Humberside Fire and Rescue Service, in Grimsby, Tuesday, March 5, 2013. The Duchess was visiting The Prince’s Trust Team program  which is a 12-week personal development scheme, which helps unemployed 16-25 year olds build the skills and confidence they need to get a job. (AP Photo/Scott Heppell)

  • The Duchess Of Cambridge Makes An Official Visit To Grimsby

    GRIMSBY, UNITED KINGDOM - MARCH 5: Catherine, Duchess of Cambridge visits the Fishing Heritage Centre during an official visit to Grimsby on March 5, 2013 in Grimsby, England. (Photo by Samir Hussein/WireImage)

  • The Duchess Of Cambridge Makes An Official Visit To Grimsby

    GRIMSBY, ENGLAND - MARCH 05: Catherine, Duchess of Cambridge during her official visit to The National Fishing Heritage Centre on March 5, 2013 in Grimsby, England. (Photo by Mark Cuthbert/UK Press via Getty Images)

  • The Duchess Of Cambridge Makes An Official Visit To Grimsby

    GRIMSBY, UNITED KINGDOM - MARCH 5: Catherine, Duchess of Cambridge meets a girl as she visits the Fishing Heritage Centre during an official visit to Grimsby on March 5, 2013 in Grimsby, England. (Photo by Samir Hussein/WireImage)

  • Royal visit to Grimsby

    The Duchess of Cambridge sits next to a dummy of the Ship's Mate at the Skipper's Table on display during her tour of the National Fishing Heritage Centre, Grimsby.

  • Royal visit to Grimsby

    The Duchess of Cambridge greets well-wishers outside the National Fishing Heritage Centre, Grimsby.

  • Royal visit to Grimsby

    The Duchess of Cambridge talks to former trawler-man John Vincent during her tour of the National Fishing Heritage Centre, Grimsby.

  • Royal visit to Grimsby

    The Duchess of Cambridge talks to former trawler-man John Vincent during her tour of the National Fishing Heritage Centre, Grimsby.

  • Royal visit to Grimsby

    The Duchess of Cambridge sits next to a dummy of the Ship's Mate at the Skipper's Table on display during her tour of the National Fishing Heritage Centre, Grimsby.

  • Royal visit to Grimsby

    The Duchess of Cambridge talks to former trawler-man John Vincent during her tour of the National Fishing Heritage Centre, Grimsby.

  • Royal visit to Grimsby

    The Duchess of Cambridge waves to the crowds outside the National Fishing Heritage Centre, Grimsby.

  • The Duchess Of Cambridge Visits Grimsby

    GRIMSBY, ENGLAND - MARCH 05: Catherine, Duchess of Cambridge arrives at the National Fishing Heritage Centre on March 5, 2013 in Grimsby, England. The pregnant Duchess of Cambridge is spending the day visiting Grimsby in the North East of England. (Photo by Chris Jackson/Getty Images)

  • The Duchess Of Cambridge Visits Grimsby

    GRIMSBY, ENGLAND - MARCH 05: Catherine, Duchess of Cambridge arrives at the National Fishing Heritage Centre on March 5, 2013 in Grimsby, England. The pregnant Duchess of Cambridge is spending the day visiting Grimsby in the North East of England. (Photo by Chris Jackson/Getty Images)

  • The Duchess Of Cambridge Visits Grimsby

    GRIMSBY, ENGLAND - MARCH 05: Catherine, Duchess of Cambridge arrives at the National Fishing Heritage Centre on March 5, 2013 in Grimsby, England. The pregnant Duchess of Cambridge is spending the day visiting Grimsby in the North East of England. (Photo by Chris Jackson/Getty Images)

  • The Duchess Of Cambridge Visits Grimsby

    GRIMSBY, ENGLAND - MARCH 05: Catherine, Duchess of Cambridge arrives at the National Fishing Heritage Centre on March 5, 2013 in Grimsby, England. The pregnant Duchess of Cambridge is spending the day visiting Grimsby in the North East of England. (Photo by Chris Jackson/Getty Images)

  • The Duchess Of Cambridge Visits Grimsby

    GRIMSBY, ENGLAND - MARCH 05: Catherine, Duchess of Cambridge arrives at the National Fishing Heritage Centre on March 5, 2013 in Grimsby, England. The pregnant Duchess of Cambridge is spending the day visiting Grimsby in the North East of England. (Photo by Chris Jackson/Getty Images)

  • The Duchess Of Cambridge Visits Grimsby

    GRIMSBY, ENGLAND - MARCH 05: Catherine, Duchess of Cambridge arrives at the National Fishing Heritage Centre on March 5, 2013 in Grimsby, England. The pregnant Duchess of Cambridge is spending the day visiting Grimsby in the North East of England. (Photo by Chris Jackson/Getty Images)

  • The Duchess Of Cambridge Visits Grimsby

    GRIMSBY, ENGLAND - MARCH 05: Catherine, Duchess of Cambridge arrives at the National Fishing Heritage Centre on March 5, 2013 in Grimsby, England. The pregnant Duchess of Cambridge is spending the day visiting Grimsby in the North East of England. (Photo by Chris Jackson/Getty Images)

  • The Duchess Of Cambridge Visits Grimsby

    GRIMSBY, ENGLAND - MARCH 05: Catherine, Duchess of Cambridge arrives at the National Fishing Heritage Centre on March 5, 2013 in Grimsby, England. The pregnant Duchess of Cambridge is spending the day visiting Grimsby in the North East of England. (Photo by Chris Jackson/Getty Images)

  • The Duchess Of Cambridge Visits Grimsby

    GRIMSBY, ENGLAND - MARCH 05: Catherine, Duchess of Cambridge arrives at the National Fishing Heritage Centre on March 5, 2013 in Grimsby, England. The pregnant Duchess of Cambridge is spending the day visiting Grimsby in the North East of England. (Photo by Chris Jackson/Getty Images)

  • The Duchess Of Cambridge Visits Grimsby

    GRIMSBY, ENGLAND - MARCH 05: Catherine, Duchess of Cambridge arrives at the National Fishing Heritage Centre on March 5, 2013 in Grimsby, England. The pregnant Duchess of Cambridge is spending the day visiting Grimsby in the North East of England. (Photo by Chris Jackson/Getty Images)

  • The Duchess Of Cambridge Visits Grimsby

    GRIMSBY, ENGLAND - MARCH 05: Catherine, Duchess of Cambridge arrives at the National Fishing Heritage Centre on March 5, 2013 in Grimsby, England. The pregnant Duchess of Cambridge is spending the day visiting Grimsby in the North East of England. (Photo by Chris Jackson/Getty Images)

  • The Duchess Of Cambridge Visits Grimsby

    GRIMSBY, ENGLAND - MARCH 05: Catherine, Duchess of Cambridge arrives at the National Fishing Heritage Centre on March 5, 2013 in Grimsby, England. The pregnant Duchess of Cambridge is spending the day visiting Grimsby in the North East of England. (Photo by Chris Jackson/Getty Images)

  • The Duchess Of Cambridge Visits Grimsby

    GRIMSBY, ENGLAND - MARCH 05: Catherine, Duchess of Cambridge arrives at the National Fishing Heritage Centre on March 5, 2013 in Grimsby, England. The pregnant Duchess of Cambridge is spending the day visiting Grimsby in the North East of England. (Photo by Chris Jackson/Getty Images)

  • The Duchess Of Cambridge Visits Grimsby

    GRIMSBY, ENGLAND - MARCH 05: Catherine, Duchess of Cambridge arrives at the National Fishing Heritage Centre on March 5, 2013 in Grimsby, England. The pregnant Duchess of Cambridge is spending the day visiting Grimsby in the North East of England. (Photo by Chris Jackson/Getty Images)

  • The Duchess Of Cambridge Visits Grimsby

    GRIMSBY, ENGLAND - MARCH 05: Catherine, Duchess of Cambridge arrives at the National Fishing Heritage Centre on March 5, 2013 in Grimsby, England. The pregnant Duchess of Cambridge is spending the day visiting Grimsby in the North East of England. (Photo by Chris Jackson/Getty Images)

  • The Duchess Of Cambridge Visits Grimsby

    GRIMSBY, ENGLAND - MARCH 05: Catherine, Duchess of Cambridge arrives at the National Fishing Heritage Centre on March 5, 2013 in Grimsby, England. The pregnant Duchess of Cambridge is spending the day visiting Grimsby in the North East of England. (Photo by Chris Jackson/Getty Images)

  • The Duchess Of Cambridge Visits Grimsby

    GRIMSBY, ENGLAND - MARCH 05: A man dressed in a St George costume rides past crowds waiting for the arrival of Catherine, Duchess of Cambridge on a motocycle decorated as a dragon at the National Fishing Heritage Centre on March 5, 2013 in Grimsby, England. The pregnant Duchess of Cambridge is spending the day visiting Grimsby in the North East of England. (Photo by Chris Jackson/Getty Images)

  • The Duchess Of Cambridge Visits Grimsby

    GRIMSBY, ENGLAND - MARCH 05: A man dressed in a St George costume rides past crowds waiting for the arrival of Catherine, Duchess of Cambridge on a motocycle decorated as a dragon at the National Fishing Heritage Centre on March 5, 2013 in Grimsby, England. The pregnant Duchess of Cambridge is spending the day visiting Grimsby in the North East of England. (Photo by Chris Jackson/Getty Images)

  • The Duchess Of Cambridge Visits Grimsby

    GRIMSBY, ENGLAND - MARCH 05: A man dressed in a St George costume rides past crowds waiting for the arrival of Catherine, Duchess of Cambridge on a motocycle decorated as a dragon at the National Fishing Heritage Centre on March 5, 2013 in Grimsby, England. The pregnant Duchess of Cambridge is spending the day visiting Grimsby in the North East of England. (Photo by Chris Jackson/Getty Images)

  • Royal visit to Grimsby

    The Duchess of Cambridge greets well-wishers outside the National Fishing Heritage Centre, Grimsby.

  • Royal visit to Grimsby

    The Duchess of Cambridge greets well-wishers outside the National Fishing Heritage Centre, Grimsby.

  • Royal visit to Grimsby

    The Duchess of Cambridge greets well-wishers outside the National Fishing Heritage Centre, Grimsby.

  • Royal visit to Grimsby

    The Duchess of Cambridge greets well-wishers outside the National Fishing Heritage Centre, Grimsby.

  • Royal visit to Grimsby

    The Duchess of Cambridge arrives outside the National Fishing Heritage Centre, Grimsby.

  • Royal visit to Grimsby

    The Duchess of Cambridge waves to the crowds outside the National Fishing Heritage Centre, Grimsby.

RELATED: Check Out Some Of Her Other Fashion Repeats

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  • Erdem Dress

    LOOK 1: At the Trooping of Colours event in June 2012. LOOK 2: At a friend's wedding in September 2012. (Getty/Ikon Pictures)

  • Whistles Dress

    LOOK 1: At the Diamond Jubilee Concert, June 4, 2012 LOOK 2: At the London 2012 Olympics Closing Ceremony, August 12, 2012 (Getty photos)

  • Roksanda Ilincic Frock

    LOOK 1: North American Royal Tour in Beverly Hills, July 8, 2011 LOOK 2: Arts reception during the 2012 London Olympics, July 30, 2012

  • Jane Troughton Brocade Coat

    <strong>LOOK 1</strong>: At a wedding in London on August 14, 2009. <br> <br><strong>LOOK 2</strong>: At a celebration for Prince Philip's 90th birthday on June 12, 2011, wearing a Zara dress and L. K. Bennett shoes. (Getty photos)

  • Ted Baker Trenchcoat

    <strong>LOOK 1</strong>: At the Cheltenham Horse Racing Festival in England on March 14, 2008, wearing a black fedora, scarf and boots. <br> <br><strong>LOOK 2</strong>: Arriving at a hotel in Yellowknife on July 4, 2011, wearing navy pumps. (Getty photos)

  • Issa Dress

    <strong>LOOK 1</strong>: Arriving at the Goring Hotel on April 28, 2011, wearing L.K. Bennett wedges. <br> <br><strong>LOOK 2</strong>: Speaking with volunteers in Ottawa on June 30, 2011, wearing Pied à Terre slingback wedges. (Getty photos)

  • Gold Sign Jeans, White Ten Gallon Hat

    <strong>LOOK 1</strong>: At a rodeo demonstration in Calgary, Canada on July 7, 2011, wearing a blouse by Temperley. <br> <br> <strong>LOOK 2</strong>: Watching a rodeo demonstration at the BMO Center in Calgary, Canada on July 8, 2011 in an Alice by Temperley blouse. (Getty photos)

  • Jane Troughton Gold Brocade Coat

    <strong>LOOK 1</strong>: Worn with a feathered fascinator to the nuptials of Laura Parker Bowles and Harry Lopes. <br> <br><strong>LOOK 2</strong>: Paired with an elaborate hat at Zara Phillips' wedding. (Getty photos)

  • L.K. Bennett Nude Pumps

    <strong>LOOK 1</strong>: Arriving in Ottawa, Canada in an Erdem dress on June 30, 2011. <br> <br> <strong>LOOK 2</strong>: Arriving at the Calgary airport in a Jenny Packham dress on July 7, 2011. (Getty photos)

  • DVF "Maja" Dress

    <strong>LOOK 1</strong>: At the British Consul-General's residence in L.A. on July 8, 2011. <br> <br><strong>LOOK 2</strong>: At Zara Phillips' pre-wedding party. (Getty photos)

  • Reiss Dress

    <strong>LOOK 1</strong>: Keeping it simple while posing for official engagement photos. (AP photo) <strong>LOOK 2</strong>: Arriving at the Canadian Museum of Civilization for a Canada Day celebration in Quebec on July 1, 2011, wearing a Sylvia Fletcher/Lock and Co. hat. (Getty photo)

  • Sebago Shoes

    <strong>LOOK 1</strong>: Attending a dragon boat race in Charlottetown, Canada on July 4, 2011, wearing J Brand twill pants. <strong>LOOK 2</strong>: Boarding a sea plane in Yellowknife Canada, wearing J Brand pants on ​July 5, 2011. (Getty photos)

  • Pied à Terre Slingback Wedges

    <strong>LOOK 1</strong>: Speaking with volunteers in Ottawa on June 30, 2011, wearing an Issa dress. <br> <br><strong>LOOK 2</strong>: Boarding a plane in Yellowknife, Canada on July 6, 2011, wearing a Smythe blazer and J Brand twill pants. (Getty photos)

  • Smythe Blazer

    <strong>LOOK 1</strong>: Departing for Canada on June 30, 2011 in a Roland Mouret dress, carrying a Mulberry bag. <br> <br><strong>LOOK 2</strong>: Boarding a plane in Yellowknife, Canada on July 6, 2011, wearing twill J Brand pants and Pied à Terre wedges. (Getty photos)

  • Katherine Hooker Coat

    <strong>LOOK 1</strong>: At the Cheltenham Races on March 17, 2006, keeping warm with a fur hat. <br> <br><strong>LOOK 2</strong>: Launching a lifeboat in Wales on February 24, 2011. Catherine got the coat shortened (a look we much prefer!). (Getty photos)

  • J Brand Twill Pants

    <strong>LOOK 1</strong>: Boarding a sea plane in Yellowknife, Canada, wearing Sebago boat shoes. <br> <br> <strong>LOOK 2</strong>: Boarding a plane in Yellowknife, Canada on July 6, 2011, wearing a Smythe blazer and Pied à Terre wedges. (Getty photos)

  • L.K. Bennett Black Wedges

    <strong>LOOK 1</strong>: Arriving at the Goring Hotel the day before the Royal Wedding in a dress by Issa. <br> <br><strong>LOOK 2</strong>: Leaving Buckingham Palace the day after the Royal Wedding, wearing a Zara dress. (Getty photos)

  • Zara Dress

    <strong>LOOK 1</strong>: Leaving Buckingham Palace the day after the Royal Wedding, wearing L. K. Bennett wedges. <br> <br><strong>LOOK 2</strong>: Celebrating Prince Phillip's 90th birthday on June 12, 2011 in a Jane Troughton brocade coat. (Getty photos)

  • Princess Diana's Repurposed Earrings

    <strong>LOOK 1</strong>: Paired with a Temperley London frock at Wimbledon on June 27, 2011. <br> <br><strong>LOOK 2</strong>: On the last day of her North America tour, in a Whistles ensemble. (Getty photos)

  • Amanda Wakeley Suit

    <strong>LOOK 1</strong>: Meeting with children at a soccer club in Darwen, north-west England on April 11 with a half-up hairdo. <br> <br><strong>LOOK 2</strong>: Posing for the official North American Tour portrait on June 3 in London with a sleek, natural-looking coif. (Getty photos)

  • Natalie Handbag By L.K. Bennett

    <strong>LOOK 1</strong>: Worn with a hand-painted, chinoiserie silk dress by Jenny Packham to a polo match in Santa Barbara on July 9, 2011. <br> <br><strong>LOOK 2</strong>: Worn with a canary yellow Jenny Packham dress at Calgary Airport two days earlier. (Getty photos)

  • Queen Elizabeth's Maple Leaf Brooch

    <strong>LOOK 1</strong>: Stuck on a red Catherine Walker coat during the couple's last hours in Canada. <br> <br><strong>LOOK 2</strong>: Pinned to a purple Issa dress on Canada Day. (Getty photos)

  • Suede Prada Pumps

    <strong>LOOK 1</strong>: At a welcome ceremony in Charlottetown, Canada on July 4, 2011, wearing an Alexander McQueen dress. <br> <br><strong>LOOK 2</strong>: Meeting participants in an Inner City Arts program in a Whistles skirt on July 10, 2011. (Getty photos)

  • Lavender Jenny Packham Dress

    <strong>LOOK 1</strong>: The wedding of Emily McCorquodale and James Hutt on July 7th, 2012, paired with her bronze pillbox hat and a gray Katherine Hoooker coat. <strong>LOOK 2</strong>: At Kate Middleton and Prince William's Royal Canada & California tour, on July 9, 2011. (Getty photos)

  • Blue Tweed Coat Dress By Missoni

    LOOK 1: Diamond Jubilee Event at Fortnum & Mason, March 1, 2012 LOOK 2: Diamond Julbille visit to Nottingham, June 13, 2012 (Getty photos)

  • Pink Pleated Dress

    LOOK 1: Sovereign Monarchs Jubilee Lunch in Kensington, May 18, 2012 LOOK 2: Diamond Jubilee Party at Buckingham Palace, May 26, 2012 (Getty photos)

  • Alexander McQueen Sailor Dress

    LOOK 1: Canada tour in Prince Edward Island, July 5, 2011 LOOK 2: Wimbledon, July 4, 2012 (Getty photos)