UPDATE: On Feb. 28, 2014, Justin Trudeau announced the birth of his and Sophie Grégoire's third child, a baby boy named Hadrian.

ORIGINAL STORY:
Liberal Leader Justin Trudeau announced on Twitter Tuesday that his wife, Sophie Grégoire, is pregnant with the couple's third child.

Trudeau and Grégoire married in 2005 after a whirlwind romance. Their first child, Xavier James, was born on Oct. 18, 2007 — Pierre Elliott Trudeau’s birthday. Their daughter, Ella Grace, was born Feb. 5, 2009.

The new baby is due in March and Trudeau spokeswoman Mylene Dupere says the couple is thrilled about expanding their young family.

In an eBook released before Trudeau won the Liberal leadership, HuffPost Canada's Ottawa bureau chief Althia Raj wrote about how Trudeau fell in love with Grégoire, a Quebec TV personality, almost immediately in 2004.

From the book:

Friend Thomas Panos first learned that Justin Trudeau was in love when he called in June of 2004 asking for a business-class ticket to Athens for his girlfriend. Trudeau was attending the Olympic Games as a reporter for CKAC.

"She's the one," he told Panos. He had met Sophie Grégoire, a childhood friend of his brother, Michel, when she and Justin co-hosted a Starlight Children's Foundation event. They'd hit it off, and the following day she sent him an email suggesting they meet up. But Trudeau never responded.

"I knew that the day I went out for coffee with her, that would be the last day I would ever have as a single man," Trudeau told CPAC's Catherine Clark on the program "Beyond Politics" in 2009. He had a few loose ends to wrap up, he said. Three months later, Trudeau bumped into Grégoire in Montreal and apologized for not writing back. They went out and over dinner he told her they would have to skip dating and go straight to engagement. "I am going to spend the rest of my life with you," he declared.

There was nothing impulsive about his decision, he told Clark. "It was a deep recognition that Sophie was the person I wanted to spend my life with."

Grégoire opened up about her family to The Globe and Mail in February, saying she is confident her husband can be both a good father and successful leader. She also told the newspaper her young children possess the inner peace to handle the spotlight.

"I realize now, they were born to this," she said. "It’s normal for them when they see a huge group of people and everyone’s rushing up – they’re not stressed."

With files from The Canadian Press

Also on HuffPost:

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  • 14. She's An Only Child

    <a href="http://womenonthefence.com/2011/10/05/exclusive-interview-with-sophie-gregoire-trudeau/#more-11530">Grégoire is the only child of a stockbroker and a former nurse</a>. She grew up in Sainte-Adèle, Que. and Montreal.

  • 13. She Suffered From Bulimia

    <a href="http://womenonthefence.com/tag/bulimia/">Grégoire has said she suffered from bulimia</a> as a teen and now works with the <a href="http://cliniquebaca.com/en/home-page">BACA clinic</a> to help others dealing with eating disorders.

  • 12. She Studied Multiple Subjects Too

    Her <a href="http://www.huffingtonpost.ca/2012/05/17/justin-trudeau-facts-bio-story-history_n_1523997.html#slide=984954">husband is famous for his disparate degrees</a>, but <a href="http://www.imdb.com/name/nm2743078/bio">Grégoire also explored a number of different career paths while at school</a>. She first studied commerce at McGill before earning a B.A. in Communications from the Université de Montreal.

  • 11. Not Everyone Loves Her

    <a href="http://www.theglobeandmail.com/news/politics/fur-flies-over-justin-trudeaus-christmas-card/article1320411/">Grégoire and Trudeau both faced criticism from animal activists for posing in fur with their children for their 2010 Christmas card</a>.

  • 10. She Likes Solitude

    <a href="http://womenonthefence.com/2011/10/05/exclusive-interview-with-sophie-gregoire-trudeau/#more-11530">Grégoire has said that when she's away from her husband or kids she doesn't feel lonely</a>.

  • 9. She Has Musical Ambitions

    <a href="http://womenonthefence.com/2011/10/05/exclusive-interview-with-sophie-gregoire-trudeau/#more-11530">Grégoire has said she wants to make a music album</a> at some point in the future. <a href="http://www.imdb.com/name/nm2743078/bio">She has studied the flute and guitar</a>.

  • 8. She's A Bath Person

    <a href="http://www.canadianfamily.ca/articles/mama-mission/">Grégoire makes a point of bathing with her children</a> every night.

  • 7. She Went To School With Trudeau's Brother

    <a href="http://www.macleans.ca/canada/national/article.jsp?content=20050606_106678_106678">Grégoire attended school with Trudeau's younger brother Michel</a>, who died in an avalanche in 1998 at the age of 23

  • 6. She Speaks Three Languages

    Grégoire's native tongue is French, but she also speaks English and <a href="http://thismomloves.blogspot.ca/2012/09/sophie-gregoire-trudeau-momterview.html">Spanish</a>.

  • 5. Yoga Enthusiast

    <a href="http://thismomloves.blogspot.ca/2012/09/sophie-gregoire-trudeau-momterview.html">Grégoire has said she will become a certified Yoga teacher</a> by the end of 2012.

  • 4. She Helped Design Her Own Wedding Dress

    <a href="http://www.macleans.ca/canada/national/article.jsp?content=20050606_106678_106678">Grégoire was involved in the design from boutique Les Noces Couture</a>.

  • 3. She Was A Personal Shopper

    <a href="http://www.macleans.ca/canada/national/article.jsp?content=20050606_106678_106678">Grégoire once worked as a personal shopper</a> at the upscale department store Holt Renfrew.

  • 2. Not A Fan Of Trudeau's Potty Mouth

    <a href="http://www.thestar.com/news/canada/politics/article/1103345--trudeau-fighting-fit-as-he-hits-his-40s">Trudeau said Grégoire chided him for calling Environment Minister Peter Kent a "piece of shit"</a> in the House of Commons.

  • 1. She Has Skydived

    <a href="http://www.macleans.ca/canada/national/article.jsp?content=20050606_106678_106678">Grégoire has jumped out a plane</a> and has admitted that she loves extreme sports.

  • UP NEXT:: Sophie Gregoire's Style

  • Victory Is Theirs!

    Sophie doesn't want to take the attention away from her husband Justin Trudeau, the newly minted leader of the Liberal Party of Canada. A black dress is therefore appropriate.

  • Some Like It Hot

    The Trudeaus have the most unconventional style in the Canadian politcal arena, and Sophie doesn't even have Pierre's fashionable genes. She looks gorgeous in a navy halter jumpsuit at the Toronto International Film Festival in 2012.

  • The Colour Purple

    Purple is the colour of royalty, right? At the Liberal showcase on April 6, 2013, Sophie wore her purple shift dress with confidence.

  • Sophie's Choice

    Justin is totally jealous of Sophie's purple satin top.

  • Getting Jiggy Wit It

    Purple seems to be an ongoing theme in Sophie's wardrobe. This time it's an eggplant-coloured dress. Is Justin wearing a matching shirt? Couples really do end up dressing alike.

  • Lady In Leather

    Will Stephen Harper allow Sophie to wear a leather bustier to 24 Sussex Drive for dinner? Is fun allowed there?

  • Wrapped Up

    In true Canadian style, Sophie wraps herself up in a pretty scarf over a beige blouse. And once again, Justin tries to match his beloved.

  • Wedded Bliss

    Kate Middleton, eat your heart out.

  • Get Down Tonight

    Sophie makes Justin look positively geeky in her flowy red wrap dress. She's too cool for school.

  • Bow Down To Your Queen

    Justin who? All eyes are on Miss Thang in a strapless champagne-coloured gown with an origami-inspired belt.

  • Next: Justin Trudeau Wins

  • Justin Trudeau, his wife Sophie Gregoire and their children Xavier and Ella-Grace celebrate after he won the Federal Liberal leadership Sunday April 14, 2013 in Ottawa.

  • Justin Trudeau and his wife Sophie Gregoire celebrate after he won the Federal Liberal leadership Sunday April 14, 2013 in Ottawa.

  • Justin Trudeau, his wife Sophie Gregoire and their children Xavier and Ella-Grace celebrate after he won the Federal Liberal leadership Sunday April 14, 2013.

  • Justin Trudeau and his mother Margaret Trudeau celebrate after he won the Federal Liberal leadership Sunday April 14, 2013 in Ottawa.

  • Justin Trudeau takes the stage as leader of the Liberal Party in Ottawa, Sunday April 14, 2013.

  • Justin Trudeau speaks after winning the Federal Liberal leadership Sunday April 14, 2013 in Ottawa116.

  • Justin Trudeau, his wife Sophie Gregoire and their children Xavier and Ella-Grace celebrate after he won the Federal Liberal leadership Sunday April 14, 2013 in Ottawa.

  • The remaining leadership candidates stand on stage during the Federal Liberal leadership announcement in Ottawa Sunday April 14, 2013.

  • Justin Trudeau and his wife Sophie Gregoire arrive for the Federal Liberal leadership announcement in Ottawa, Sunday April 14, 2013 .

  • Justin Trudeau and his wife Sophie Gregoire greet supporters at the Federal Liberal leadership announcement in Ottawa, Sunday. April 14, 2013 .

  • Liberal Party leadership candidates Justin Trudeau and Martha Hall Findlay chat before Liberal Party Leadership results are announced come in Ottawa, Sunday April 14, 2013.

  • Jordan Crosby of Ottawa supports Justin Trudeau as he hands out Trudeau T-shirts prior to the Liberal leadership announcement in Ottawa on Sunday, April 14, 2013.

  • Former prime minister Jean Chretien speaks at the Federal Liberal leadership Sunday April 14, 2013 in Ottawa.

  • Liberal leadership candidate Justin Trudeau speaks at the Liberal leadership announcement in Ottawa, Sunday, April 14, 2013.

  • Leadership candidate Justin Trudeau hugs Deborah Coyne as Joyce Murray stands next to them on stage during the Liberal leadership announcement in Ottawa Sunday April 14, 2013 .

  • Interim Liberal leader Boe Rae speaks at the Federal Liberal leadership Sunday April 14, 2013 in Ottawa.

  • Justin Trudeau Wins Liberal Leadership: Twitter Reactions