Finn Wolfhard stars in the horror film 'It' as Richie Tozier, one of the members of the Losers' Club. The movie, based on Stephen King's novel, follows a group of kids who are terrorized by a shape-shifting entity that takes the form of Pennywise the Dancing Clown. Finn's performance in 'It' received critical acclaim, and the film was a huge success at the box office.