Didier Conrad was born in Marseille into a family of Swiss origins. At the age of 14, Conrad published his first comic in Spirou magazine in 1973. Five years later, he began a longtime collaboration with Yann, also a young artist/writer from Marseille. In 1980, they created their first long series, 'Les Innomables'. The first episode, 'Matricule triple zéro', was written by Conrad and drawn by Yann, but they switched duties from the second story, and a legendary series was born. In 1991, Conrad returned to Spirou, where he began the children's series 'Donito' in 1991. In 1994, he resumed his collaboration with Yann again, and they revived the 'Innomables', this time at Dargaud. Between 1996 and 2004 they created their most classic stories with the characters in three cycles, situated in Hong-Kong, Korea and the USA.