Born and raised in Belgium, Morris moved to the United States in 1946 for six years. There, he worked for MAD magazine and met RenéGoscinny, with whom he collaborated from 1955 until Goscinny's death in 1977. JeanLéturgie co-created the character of Percevan before he began an enduring cooperation with XavierFauche that produced eight Lucky Luke titles, followed by the spin-off series Rantanplan (Rin Tin Can) and Kid Lucky. Fauche, a well-known figure in French radio, also wrote for the French version of Jim Henson's show Fraggle Rock and co-created the cartoon Les Tifous
