(1953) debuts on the pages of magazines Spirou and Pif, first as an artist, then mostly as a writer. He has created many a successful characters, such as Marine, Smith & Wesson, L’école Abracadabra and Timoty Titan, with his long time friend Giorgio Cavazzano. With Colin Wilson, after the death of Jean-Michel Charlier he has become the scribe of young Blueberry’s adventures.