HOLLYWOOD, Calif. — Christina Applegate debuted her baby bump for the first time when she attended Sunday's premiere of Cats & Dogs: The Revenge of Kitty Galore. The actress, who revealed the pregnancy last week, was admittedly nervous before hitting the Hollywood event.

"About to get ready for the Cats and Dogs dealio," she wrote on Twitter. "All is well except that I don't know how to dress this belly yet. So big black shirt it is."

This will be the first child for Applegate, 38, and her fiancé, musician Martyn Lenoble. The former Married with Children star is remaining mum when it comes to the baby's gender and due date, but she did open up about some of her pregnancy cravings, telling Entertainment Tonight that she's longing for "weird things at weird hours," but particularly avocados.

Applegate and Lenoble have yet to set a wedding date after getting engaged on Valentine's Day.

Also see: Christina Applegate Pictures