Shooting on the film is to start this spring in New York. Conrad wrote the script and will direct the picture, while Judy Belushi Pisano -- Belushi's high school sweetheart, then wife -- is producing it, the entertainment industry trade newspaper said.
Belushi died of a drug overdose in 1982. He was 33. The comedian was best known for his work on TV's "Saturday Night Live," as well as in the films "Animal House" and "The Blues Brothers."
Hirsch, 28, has starred in the films "Killer Joe," "Milk" and "Into the Wild."