Coste originally worked for a travel agency in the Bordeaux region.  . In 2001, she won a competition, organized by French trade magazine Hot Vidéo , to pose for an erotic photography session. Shortly afterwards, she started a career in adult films .  In the early 2000s, she was one of France's most popular pornographic actresses thanks to her " girl next door " image.  
From 2002 to 2003, Coste worked as an exclusive contract performer for Marc Dorcel productions, who had been looking for an equivalent to Clara Morgane .  In 2003, she won the Venus Award for best actress.  She also wrote a column about sexuality for the French version of FHM .  At the time, she was, for over one year, in a relationship with journalist and television presenter Philippe Vecchi.  She retired from porn after making less than 20 hardcore features.