Former Disney teen queen Hilary Duff is pregnant with her first child, with husband Mike Comrie. The young couple has been married for only a year.

"I can't believe it has already been a year, time really flies when you're having fun!," Duff wrote on her official website. "We also want to share the exciting news that BABY MAKES THREE!!! We are extremely happy and ready to start this new chapter of our lives."

Its been 10n years since Duff rose to fame as Lizzie McGuire on the Disney series of the same name. Fans of the hit show reflected on Twitter about the exciting and surprising news!

""Hilary Duff is pregnant! It was just like yesterday that she was Lizzie! Congratulations!"

"Hilary Duff's pregnant, Harry Potter's over, Drake & Josh moved out, That's So Raven ended, Zack & Cody graduated. #endofchildhood :("

"It's odd to think Hilary Duff is pregnant. It seems like yesterday when she was in love with Ethan and hanging out with Miranda and Gordo."

"Hilary Duff is pregnant?? I need 2 find my Lizzie Movie soundtrack & put "So Yesterday" on repeat."

"HILARY DUFF IS PREGNANT. MY CHILDHOOD IS OVER. WHAT HAPPENED TO CHILLING WITH MIRANDA AND GORDO? AND HER CRUSH ON ETHAN"

"Hilary Duff is pregnant...wow. How time flys!"

"Hilary duff is pregnant, zack & cody are graduated, joe jonas just turned 22... My childhood is officially over."

"Hilary Duff is pregnant... I remember watching Lizzie McGuire and now she's going to be a mom.. years go by fast... I'm happy for her."

"Hilary Duff is still the original disney girl!"

Even if you didn't write it on Twitter, you may have had the same sentiments upon hearing this news. Even if you weren't a fan of Lizzie McGuire, you know Hilary from films such as "Raise Your Voice," "The Perfect Man," with Heather Locklear, "A Cinderella Story," co-starring Chad Michael Murray, and "Cheaper By the Dozen 1 & 2" starring Steve Martin and Bonnie Hunt. And, in 2003, she starred in the smash hit "The Lizzie McGuire Movie."

Throughout her career, Duff also had a successful music career. She sung on the "Lizzie McGuire Soundtrack," and also released "Santa Claus Lane" in 2002. Later, she had had a hit with her self titled album released in 2004. "Hilary Duff" has sold almost 2 million albums to date.While her albums did not always receive the best critical reviews, teeny boppers around the world we loyal fans of Hilary after tracks like "So Yesterday" and "Why Not."

In 2007, she came out with her fourth studio album--"Dignity." Singles included "Play With Fire" and "With Love." This album took more of a dance feel to it as opposed to her previous pop rock tunes. She had two US club hits and it reached the top ten in several countries as well.

Recently, Duff has appeared on "Gossip Girl," ""Ghost Whisperer," and an ABC Family film called "Beauty and the Briefcase." She has become a New York Times Bestselling author with the release of her young adult book--"Elixir." The second book in the series is scheduled for release in October.

Hilary Duff and her husband announced the baby news on their one-year anniversary.

Here is one of Hilary Duff's first singles ever, off the "Lizzie McGuire Soundtrack," along with clips of the show.