Studio 60 on the Sunset Strip star Amanda Peet, 35, has given birth to a baby girl.

Sources tell Usmagazine.com that Peet went into labor on Tuesday, resulting in the debut of Frances Pen – named after Peet’s mom, Penny.

The Syriana star and her screenwriter husband, David Benioff, 36, were married in September 2006. This is the first child for both. A rep for Peet didn't return calls for comment.