Celebrity Sarah Michelle Gellar Steps Out for Opening Night of 'Cruel Intentions' Musical Parody "It's so crazy. It was such a flood of memories," she told PEOPLE By Matthew Cole Weiss Published on April 11, 2015 01:55 PM Share Tweet Pin Email Photo: Abel Armas Who’s ready to see Cruel Intentions, the musical? That’s right: 16 years after the release of the seminal teen flick starring Ryan Phillippe and Sarah Michelle Gellar as ruthless, sex-crazed siblings, Cruel Intentions: The Completely Unauthorized Musical parody had its opening night on Friday. And guess who was front row? None other than Gellar herself. “We were babies when we made the film. I was 20! I celebrated my 21st birthday during filming,” Gellar, now 37, told PEOPLE at the Rockwell Table & Stage in Los Angeles, where the show is running through April. “It had to be some form of child abuse doing the things I did in that movie.” Like that infamous kiss scene with Selma Blair? In case you were wondering … that’s part of the show (and they’re even singing “Kiss Me” by The Cardigans as they do it). Gellar was joined by the film’s original writer/director Roger Kumble and costar Sean Patrick Thomas. The group laughed, cheered and took photos from their seats, and after, Gellar rushed backstage to meet and praise her counterpart. “It’s so crazy. It was such a flood of memories. I don’t necessarily think of it as me,” Gellar revealed. “But then they started talking, and I could feel the words coming out of my mouth!” Admittedly, it’s been a long time since she’s actually watched the film. “Sometimes I’ll be flipping channels, and it’ll be on. But then I think, ‘My God, there has to be something better to do with my time then watching myself.’ So if it’s a scene with someone else, I’ll watch it,” Gellar said. “But if it’s me, I have to turn it off.” And though a lot has changed for Gellar since making the film – like her marriage to Freddie Prinze Jr. and the birth of her children Charlotte, 5, and Rocky, 2 – when asked what she thinks is the biggest difference in her life now, Gellar simply said with a laugh, “It’s 10:45 p.m. at night. It’s past my bedtime!” Related: See Reese Witherspoon’s Changing Looks!