Born in Lourdes to a butcher father, Mouret modelled for Jean-Paul Gaultier and Yohji Yamamoto before showing his first line of fifteen dresses in London in 1997 at thirty-six. In his Spring 2006 collection came the boat-necked, pencil-skirted Galaxy dress — called the 'dress of the season,' so ubiquitous that Vogue noted you couldn't open a magazine without seeing it on a young Hollywood star.
After a backer dispute closed his eponymous line, Mouret returned in 2007 with RM, backed by Simon Fuller, and bought back the rights to his own name in 2010, opening a London flagship opposite The Connaught. He has also designed for Gap and Banana Republic and led Robert Clergerie. The business collapsed into administration in 2021, after which designer Han Chong acquired the brand's assets.