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Amanda Peet Welcomes a Baby Girl

Amanda Peet is a mom for the second time.

The actress welcomed daughter Molly June Benioff late Monday night, People magazine reported Thursday.

"Mother and daughter are doing great," Peet's rep told the magazine.

Photos: Celebrity Babies

The actress, 38, was set to appear on "The Late Show With David Letterman" on Tuesday to promote her new film, "Please Give," but instead went into labor late Monday night and gave birth to her second daughter. Peet and her screenwriter husband, David Benioff, also have a 3-year-old daughter, Frances "Frankie" Pen.