Michel Régnier (5 May 1931 – 29 October 1999), best known by his pseudonym Greg, was a Belgian cartoonist[2] best known for Achille Talon, and later became editor of Tintin magazine.

[3] His first series, Les Aventures de Nestor et Boniface, appeared in the Belgian magazine Vers l'Avenir when he was sixteen.

He created some of his most famous series like Bruno Brazil and Bernard Prince in this period, and introduced artists like Hermann to the magazine.

[4] 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.

Greg was asked to write two stories for the Tintin comics as well, including Le Thermozéro, but in the end Hergé, wanting to keep all creative control, did not use them.