Cue My Super Sweet 16! When your parents are Sarah Michelle Gellar and Freddie Prinze Jr., a milestone birthday comes with horsepower. The couple surprised their daughter, Charlotte, with a splashy new Jeep Rubicon for her 16th birthday, sharing a sweet message along with photos of her ride on Friday, September 19. "16 years ago today, you made me a mom. I believe the quote is ... a daughter is just a little girl who grows up to be your best friend," Gellar, 48, gushed in her caption via Instagram, while showing off their coming-of-age gift with a big red bow on the hood.