Climax is a 2018 experimental psychological horror film directed, written and co-edited by Gaspar Noé. Featuring an ensemble cast of 24 actors, led by Sofia Boutella, the plot is set in 1996 and follows a French dance troupe holding a days-long rehearsal in an abandoned school; the final night of rehearsing is a success, but the group's celebratory after-party takes a dark turn when the communal bowl of sangria is spiked with LSD, sending each of the dancers into agitated, confused and psychotic states.

The film is notable for its unorthodox production, having been conceived and pre-produced in four weeks and shot in chronological order in only 15 days: although Noé conceived the premise, the bulk of the film was unrehearsed on-the-spot improvisation by the cast, who were provided no lines of dialogue beforehand and had almost complete liberty as to where to take the story and characters. Climax features unusual editing and cinematography choices, and includes several long takes, including one lasting over 42 minutes. The cast of the film consists almost exclusively of dancers who, aside from Boutella and Souheila Yacoub, had no previous acting experience.

Climax premiered on 10 May 2018 in the Directors' Fortnight section at the 2018 Cannes Film Festival, where it won the Art Cinema Award. It was theatrically released in France on 19 September 2018 by Wild Bunch and in Belgium on 21 November 2018 by O'Brother Distribution. The film received positive reviews, with much praise for its direction, cinematography, soundtrack, choreography and performances, although some criticized its violence and perceived lack of story.