Festen (pronounced [fɛsd̥ɛ̝n]) is a 1998 Danish film, produced by Nimbus Film and directed by Thomas Vinterberg. It was released under the title The Celebration in the United States.

The film tells the story of a family gathering to celebrate their father's 60th birthday. At the dinner, the eldest son publicly accuses his father of sexually abusing both him and his twin sister (who has recently killed herself). Vinterberg was inspired to write it with Mogens Rukov, based on a hoax broadcast by a Danish radio station.