Studio 60 Boss Babe Amanda Peet

Amanda Peet and screenwriter David Benioff welcomed their first child, a baby girl, this week.

A rep for the couple confirms to ET that the "Studio 60 on the Sunset Strip" star gave birth to little Frances Pen on Tuesday. The newborn weighed in at 6 lbs., 10 oz.

Ok, not a great baby name, but we can blame it on the low ratings for Studio 60, which is a tragedy btw, if you don't watch the show, start now, poor Amanda Peet has another mouth to feed.

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