Buffy the Vampire Slayer star Sarah Michelle Gellar exchanged vows with her Scooby-Doo leading man Freddie Prinze Jr. during a top-secret ceremony on Sunday in Mexico. Gellar wore a Vera Wang gown and Prinze donned a custom-made linen suit. The couple announced their engagement in April 2001. US Weekly, meanwhile reports that on the day of the nuptials Gellar was hospitalized with dehydration brought on by — eww! — "Montezuma's revenge."