 In the late 1970s he moved to the U.S. as a representative for Dargaud, working on several television projects and promoting European comics.He returned to France in the mid-1980s where he continued scripting comics and also wrote novels for the "Hardy et Lesage" collection of "Fleuve Noir".As "Greg", Regnier was one of the most prolific creators of Franco-Belgian comics, working in all genres and collaborating with many other European artists and scriptwriters.