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Ren Stevens is having a baby!

Christy Carlson Romano and her husband, Brendan Rooney, are expecting a baby girl on Christmas Day.

The "Even Stevens" alum debuted her baby bump for the first time at the premiere of "Adventures in Babysitting" in Los Angeles on Thursday night. She glowed on the red carpet in a floral maxi dress, which she paired with a gold choker, black sandals and a pretty pink lip.

"I am flabbergasted at the serendipity of having a baby on Christmas. It's our favorite holiday!" the actress tells PEOPLE. "What a gift we'll have this year. Feeling so blessed and grateful … and a little nauseous."

Romano and Rooney started dating in February 2011 while attending school at Columbia University and got engaged later that yearin Venice, Italy. The two tied the knot is a stunning wedding ceremony in Alberta, Canada, on New Year’s Eve in 2013.

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The beautiful bride wore a gorgeous Lazaro gown for the ceremony, while her hubby rocked a sharp Hugo Boss tux.

The couple chose the Fairmont Banff Springs for their big day, a spot she loved since she performed in a production of "The Sound of Music" there when she was a young girl.

"It was such a magical feeling that stayed with me, so I wanted to recapture that on my wedding day," Romano said of her venue.

Congrats to the growing family!