A biographical film that dramatizes the life of Jean-Philippe Smet, better known by his stage name Johnny Hallyday, a French rock and roll and pop singer and actor.

Benjamin Voisin
as Johnny Hallyday

Noée Abita
as Sylvie Vartan

Nina Meurisse
as Nathalie Baye

Marie Colomb
as Nanette Workman

William Lebghil
as Michel Berger

Laura Smet
as Huguette Clerc

Shane Woodward
as Lee Hallyday

José Garcia
as Johnny Stark

Sami Outalbali
as Jean Pons

Fred Testot
as Jean-Claude Camus