Au Rêve is the second studio album by French electronic duo Cassius, released in 17 September 2002 by Virgin Records in Europe and Astralwerks in the United States.

Au Rêve is a progression from Cassius' debut album 1999 in that it is a more traditional house-oriented effort[citation needed] that uses less sampling and more live vocalists.

Collaborators include Jocelyn Brown, Ghostface Killah and Steve Edwards.

David Silverman of BBC Music called it "Excellent in places, awkward and peculiar in others" and wrote: "There's nothing really new here, but then that isn't really the criteria for whether an album is good or not – its [sic] just a pity Cassius couldn't recapture the spontaneity of 1999.

"[3] All tracks are written by Zdar and Boombass; additional writers notedThis 2000s house album-related article is a stub.