Credit: Jason Merritt/Getty Images for Art of Elysium Photo: Justin Bartha and Lia Smith, January 12, 2013

The Wolfpack has a new member!

The Hangover and National Treasure star Justin Bartha and his wife, fitness trainer Lia Smith, have welcomed their first child, Us Weekly confirms.

Baby Bartha is a girl, and she was born last Sunday, April 13, but the couple has yet to reveal her name. (It’s too bad “Zach Galifianakis” is already taken — that’s a great one.)

Justin, 35, who previously dated Ashley Olsen for two years, met Lia at a Pilates class in L.A., where she worked as an instructor. They got engaged in May 2013 and were married this past January in Hawaii, where Lia is from. The wedding was attended by Reese Witherspoon and her husband, Jim Toth — Jim is Justin’s agent — plus The Social Network’s Jesse Eisenberg and The Hangover’s Ken Jeong.

Just two days after the ceremony, it was revealed that the newlyweds were expecting a baby. A witness told Us Weekly that, during the wedding, Lia "had her hand on her stomach most of the time,” and her flowing white wedding dress showed off what looked like “a little bump." So Baby Bartha got to be part of the wedding ceremony, too, although she probably won’t remember it.

Congrats to the growing family! We’re looking forward to hearing the little lady’s name — unless they just decide to stick with Baby Bartha.

Source: Us Weekly