On March 5, 1982, "Saturday Night Live" star John Belushi shot a “speedball," a mixture of coke and heroin. He was found dead at the Chateau Marmont in Los Angeles.

Surprisingly, Matheson also confirmed that Belushi was not doing drugs at the time of filming Animal House and that director John Landis was very strict on keeping drugs away from the set ...

Universal/Alamy John Landis, Bruce McGill and John Belushi on the set of 'Animal House' Hachette Books 'Damn Glad to Meet You' book cover© Provided by People ...

But the folk music scene, gaining serious traction in the early ’60s, would also play a role. To play the folk singer in Animal House, director John Landis enlisted Stephen Bishop.

“Animal House” was filmed in Eugene for 32 days in the fall of 1977. Belushi was there three days a week and returned to New York to perform in NBC’s “Saturday Night Live” on the weekends.

Yep, an Animal House musical. That's happening. And it was announced on the 30th anniversary of John Belushi's death (today). I'll tell you what, it's really hard to inject a speedball with jazz ...

John Belushi and Tim Matheson in a scene from “Animal House.” ©Universal/Courtesy Everett Collection In his book, Matheson was adamant that Belushi wasn’t using drugs while filming.