Emile Hirsch has revealed it was director Steve Conrad who convinced him to sign up for the John Belushi biopic.
The Into The Wild star is set to play the late comedian in an upcoming movie about his life, which Steve will both write and direct.
Emile, 28, told The Hollywood Reporter: "I was kind of surprised when I first heard about it.
"But I sat down with Steve Conrad, the writer-director, and he just kind of has a vision for it and was just really enthusiastic about it, and he sold me and got me really, really excited about it."
The as-yet-untitled film will explore Belushi's rise to fame in the late 70s as an original cast member of Saturday Night Live and the star of films like The Blues Brothers and Animal House.
Dan Aykroyd, one of the actor's best friends and frequent collaborator, will be an executive producer, while Belushi's widow Judy Belushi Pisano will be on board as a producer.
Emile, who became a dad for the first time when son Valor was born last month, said it was too early for much to be known about the film.
"I don't know what it'll be like or what it will yield," he said.
Belushi died in 1982, at the age of 33, following a drug overdose.