His first feature film was De StÝrste Helte (The Biggest Heroes), a road movie that received acclaim in his native Denmark. After forming the Dogme 95 collective with von Trier, he directed (and also had a small acting role in) the first of the Dogme movies, Festen (The Celebration).
In 2003 he released the apocalyptic science fiction love story It's all about Love, a movie he wrote, directed and produced himself over a period of five years. This movie was entirely in english and featured among others Joaquin Phoenix, Claire Danes, and Sean Penn. The movie was not very successful, and critics found it very complicated and hard to understand.