Tiffany Thornton Tiffany Thornton

So Random! star Tiffany Thornton and her husband Christopher Carney are expecting their second child.

Thornton, 27, announced the happy news Friday on her WhoSay account when she posted a photo of her and several friends in which she was seen with her hand over her growing baby bump. "Guess what?! Hint: why am I holding my stomach?"

Celebs with doppelganger kids

The new arrival will join big brother, Kenneth James, 14 months. Thornton and Carney married in November 2011.

In addition to playing Tawni Hart on Sonny with a Chance, and its spin-off So Random!, Thornton also portrayed Meghan McCain in the 2012 HBO film Game Change.