Freddie Prinze Jr. and Sarah Michelle Gellar

Sarah Michelle Gellar and husband Freddie Prinze Jr. welcomed a baby boy in Los Angeles this past week, Us Weekly reports.

"Mother and baby are doing great," her rep tells the magazine. "And Charlotte is VERY excited to be a big sister." A name for the new addition has not yet been released.

Check out photos of Sarah Michelle Gellar

Gellar, 35, and Prinze, 36, first met on the set of the 1997 thriller I Know What You Did Last Summer and have been married for 10 years. The couple welcomed daughter Charlotte in September 2009.

Gellar, best known as Buffy the Vampire Slayer, most recently starred in The CW's Ringer. Prinze, the star of teen films like She's All That, appeared on the final season of 24.