It's been quite the week for celebrity babies.

Yesterday, it was Desperate Housewives star Marcia Cross cranking out two of them! Today, we're happy to report that Studio 60 on the Sunset Strip star Amanda Peet, 35, has given birth to a baby girl.

Sources say Peet went into labor on Tuesday, resulting in the debut of Frances Pen - named after Peet's mom, Penny.

Yeah, it's a little strange, this name. But it's no Thijs or Heaven Rain.

The actress and her screenwriter husband, David Benioff, 36, were married in September 2006, shortly after Peet announced she was preggers.

This is the first child for both. Next up on the celebrity baby watch - Aussie actress Naomi Watts, former Felicity star Keri Russell and TV's lovable, now-married Bachelorette, Trista Sutter.

Congrats to Amanda and all these expectant ladies.