April 22, 2010 06:25 PM

Matt Carr/Getty Images

It’s a girl for Amanda Peet and husband David Benioff!

After going into labor early, Peet ditched a scheduled Tuesday appearance on The Late Show With David Letterman and instead delivered daughter Molly June Benioff late Monday, April 19 in New York City, the Please Give star’s rep tells PEOPLE exclusively.

“Mother and daughter are doing great,” says Peet’s rep. Baby Molly joins big sister Frances, 3.

Peet, 38, and Benioff, a screenwriter, announced the pregnancy in December.

What do you think of the name Molly June? Leave your thoughts and congratulations in the comments.

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