Xavier de Rosnay

Xavier Dulong de Rosnay (; born 2 July 1982) is a French electronic musician and producer who is one half of the duo Justice with Gaspard Augé.

Biography Xavier Dulong de Rosnay was born on 2 July 1982 in Ozoir-la-Ferrière, Seine-et-Marne. He is said to have grown up in Paris "on a diet of 1970s prog-rock and 1980s funk". The son of a Vietnamese-born dentist and a human resources director of a Parisian hospital, he studied graphic design at the École Estienne in Paris, where he also met Thibaut Berland (later known as Breakbot). Berland would later cite de Rosnay for his breakthrough into music.

By 2002, while he was finishing up his studies, he stayed at an apartment at the Boulevard Barbès with fellow graphic designers Gaspard "Gaspirator" Augé (whom he had met at a party) The remix resulted in the group being signed to Ed Banger (who released it) and became a hit in clubs and on the Internet. In 2005, de Rosnay contributed to the bootlegged album Bootleggers with Respect Vol II, alongside Soulwax, DJ Mehdi and Feadz, all under pseudonyms. A documentary of the tour showcased their rockstar lifestyle during the tour, although de Rosnay later clarified there were "not all things we approve of." De Rosnay was also briefly arrested after a violent altercation with a fan, although he was let go after police concluded he had acted in self-defense. In April, he collaborated with Midfield General on the track "Disco Sirens." It was succeeded by their third, Woman (2016), and the remix album Woman Worldwide (2018). Afterwards, de Rosnay co-produced Prudence's first studio album Beginnings alongside Surkin.

Public image De Rosnay playing the keyboard at a live concert in Chicago, 2012De Rosnay has been described as the more talkative half of Justice, compared to Augé. In this regard, de Rosnay has been compared to Thomas Bangalter of Daft Punk.

Personal life In a 2008 interview with Nardwuar, de Rosnay said he enjoys cooking, particularly crêpes. In 2025, he described his relationship with Augé as "fusional", adding that "I behave with him the same way I behave with myself. Like almost one entity."

Discography

As part of Justice

Other writing, production, and remix credits Title Year Performing artist(s) Co-producer(s) Album [Untitled remix of "Fat Joe- Lean Back"]