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Sarah Michelle Prinze and Freddie Prinze Jr. Have a Girl!

By David Caplan

Tuesday September 22, 2009 07:25 PM EDT

Freddie Prinze Jr. and Sarah Michelle Gellar

Claire Greenway/Getty

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Sarah Michelle Prinze and husband Freddie Prinze Jr. are parents, PEOPLE has learned exclusively.

The couple "welcomed their daughter Charlotte Grace Prinze on Saturday, Sept. 19," says a rep for the actress. "The family is over the moon."

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This is the first child for the couple, who revealed that they were expecting back in April.

Freddie Prinze Jr. will star on the upcoming season of 24. Sarah Michelle recently changed her last name from Gellar to Prinze.