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."