It’s official: Hedi Slimane is exiting Celine after six years, owner LVMH confirmed in a statement.

During his tenure, the star designer known for his trademark skinny silhouette has transformed Celine, adding menswear for the first time in the brand’s 79-year history, as well as expanding into high perfume and beauty. In womenswear, Slimane reconnected Celine to its historic identity as a purveyor of leather goods that incarnate Parisian bourgeois style, helping to more than double annual revenues to €2.5 billion, according to analyst estimates. (LVMH does not break out figures by brand).

Despite Celine’s success, sources say Slimane had been locked in a thorny contract negotiations with LVMH chairman Bernard Arnault for months before ultimately exiting the label.

Stay tuned to BoF for updates on this developing story.

Disclosure: LVMH is part of a group of investors who, together, hold a minority interest in The Business of Fashion. All investors have signed shareholders’ documentation guaranteeing BoF’s complete editorial independence.