He is frequently associated with Le Splendid, which he co-founded, along with Thierry Lhermitte, Josiane Balasko, Christian Clavier, Marie-Anne Chazel and Gérard Jugnot.

[5] He also met Marie-Anne Chazel, Christian Clavier, Thierry Lhermitte and Josiane Balasko in those school years, the group later becoming the Le splendid troupe.

In terms of his working methods as a writer, in adaptating a novel or text for a screen play he was wary of losing the original style, and he hated snipping scenes he liked.

"[8] Michel Blanc translated and adapted several English-language plays for the French stage, such as Je veux faire du cinéma in 1992 (I ought to be in pictures) by Neil Simon, Temps variable en soirée in 1996 (Communicating Doors) after Alan Ayckbourn, Espèces menacées in 1997 (Funny money) by Ray Cooney, La Chambre bleue in 1999 (The Blue Room, after La Ronde) by David Hare, La Valse à Manhattan in 2001 (The West Side Waltz) by Ernest Thompson, L'amour est enfant de salaud in 2003 (Things we do for love) by Alan Ayckbourn, Frankie et Johnny au clair de lune in 2004 (Frankie and Johnny in the Clair de Lune) after Terrence McNally and Tantine et moi in 2005 (Vigil, aka Auntie and Me) after Morris Panych.

[10] A devotee of classical music since childhood, in 2004 he gave the premiere of the monodrama for speaker and orchestra by Eric Tanguy, Sénèque, dernier jour in Paris with the Orchestre National de Bretagne.

Blanc also wrote the text for Tanguy's theatrical work, Photo d’un enfant avec une trompette, for the Théâtre des Bouffes du Nord, which had its premiere during the theatre’s 2013-2014 season.