Credit: Marcos Vasquez/BuzzFot /FilmMagic)

A month after giving birth, Sarah Michelle Prinze (nee Gellar) is back in shape.

The 32-year-old new mom - who welcomed daughter Charlotte Grace with husband Freddie Prinze Jr. on Sept. 19 - was photographed leaving the Anastasia Nail Salon in Beverly Hills Friday.

No official word on how she shed the pounds, but the actress - who next appears in 2010 HBO dramedy The Wonderful Maladys - did 55-minute Pilates sessions up to three times a week with trainer Alycea Ungaro to stay fit while pregnant.

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How are she and her hubby liking parenthood?

See who is expecting next!

"They've been waiting for this for a long time," a pal recently told Us Weekly. "They are such a loving, solid couple."