'Scooby-Doo' Stars Gellar, Prinze Wed Tue Sep 3, 2:37 PM ET LOS ANGELES (AP) - First came "Scooby-Doo," now comes "I do" for Sarah Michelle Gellar and Freddie Prinze Jr. The couple, who appeared together in this summer's talking-dog comedy "Scooby-Doo," were wed Sunday at an undisclosed location in Mexico, their spokeswoman, Leslie Sloane, said Tuesday. The bride wore a Vera Wang gown and the groom sported a custom-made linen suit, she said. A group of friends and family attended the ceremony, which was kept a closely guarded secret from the public. Gellar, star of the UPN series "Buffy the...