Sarah Michelle Gellar Shares Her Birth Story

New mom Sarah Michelle Gellar shows off her beautiful baby girl Charlotte Grace in the new issue of People magazine.

Sarah Michelle and her husband Freddie Prinze Jr share the story of little Charlotte's birth on September 19th - a week before her due date!

"I went into labor at the gym!" the 32-year-old former Buffy the Vampire Slayer star reveals. "I didn't really believe it. I just felt a little nauseous, and my trainer said to me, 'Um, isn't your baby coming next week? Maybe it's time now?' I said, 'Oh no, I doubt it...'"

It turns out her trainer was right.

"Later that night, she was like, 'OK, I think I might be in labor, but you should get some more sleep,'" Freddie recalls. "She was very calm, very centered, very prepared. I'm telling you, this girl is like Gandhi. It was like, three pushes and the baby was out."

Charlotte Grace is the first child for the couple, who wed in 2002.