Cassius is a French house music duo that consist of producers namely Philippe Cerboneschi and Hubert Blanc-Francard, also known as Philippe Zdar and Boom Bass.
In 1988, Philippe Zdar and Boom Bass started working together, producing albums for French hip-hop artist MC Solaar. In 1991 they created their first project, called La Funk Mob, and the following year, they started experimenting with a more electronic sound, which led to Zdar joining Etienne de Crécy in the project Motorbass.
Philippe Zdar and Boom Bass then created "Foxxy", their first self-published house music track, in 1996, under the name Cassius, and the moderate success that followed lead to them remixing tracks for acts such as Air and Daft Punk. In January 1999, they released their first single, "Cassius 1999". It was published by Virgin Records, and entered the UK Top 40 chart at number seven. This was soon followed by their debut album, 1999, which had two more singles released from it, "Feeling For You" and "La Mouche". The music videos for "Cassius 1999" and "Feeling for You" portrayed the character Deadman, from DC Comics, as a DJ superhero.
In 2002, its their second album release, Au Rêve. This featured the "empowered female disco" track "I'm a Woman", with Jocelyn Brown on vocals, as well as the hit single "The Sound of Violence", featuring Steve Edwards on vocals. This album had collaborations with Wu-Tang Clan member Ghostface Killah and Leroy Burgess.