The classic teen comedy American Pie turns 20 this year. Entertainment Tonight reunited the cast to mark the occasion. Alyson Hannigan tweeted a picture of the reunited actors. Hannigan, Jason Biggs, Tara Reid, Chris Klein, Seann William Scott, Natasha Lyonne, and Eddie Kaye Thomas. The reunion interview featured questions about what the cast is doing now and how American Pie influenced a generation. What is your favorite scene from the movie?