By Stephen M. Silverman
September 07, 1998 12:00 AM

Most of the stars of “Boys and Girls” — Freddie Prinze, Jr., Claire Forlani, Jason Biggs, Amanda Detmer and Heather Donahue — weren’t resting on past laurels at last night’s New York premiere. Donahue, who shot to fame in “The Blair Witch Project,” told PEOPLE that she’s distanced herself from the horror movie’s sequel: “I’ve been there, done that. It’s time to move on.” In “Boys and Girls,” she plays a nerdy engineering major, not nearly as scary as her role in “Blair Witch.” “I was like, I better damn well prove my diversity.” Biggs, the star of “American Pie,” hasn’t heard boo about a reported sequel to that movie. But asked how he’d top his apple pie scene in that flick, he said, “I don’t think anything will ever top that” — then he referred to a “farting with supermodels” scene in the final credits of “Boys and Girls.” Others at last night’s bash: Sarah Michelle Gellar (Prinze’s girlfriend), Heath Ledger, Taye Diggs, Katie Holmes, Shoshonna Lonstein and Oksana Baiul.