Tommy Chong is one of two members of a comedy act.
Cheech & Chong are a Grammy Award -- winning comedy duo consisting of Richard `` Cheech '' Marin and Tommy Chong who found a wide audience in the 1970s and 1980s for their films and stand-up routines , which were based on the hippie and free love era , and especially drug and counterculture movements , most notably their love for cannabis . Richard Anthony `` Cheech '' Marin ( born July 13 , 1946 ) is an American stand-up comedian , actor , writer , voice actor and activist who gained recognition as part of the comedy act Cheech & Chong during the 1970s and early 1980s with Tommy Chong , and as Don Johnson 's partner , Insp. Joe Dominguez , on Nash Bridges . Thomas B. Kin Chong ( born May 24 , 1938 ) is a Canadian-American comedian and actor , who is known for his marijuana-themed Cheech & Chong comedy albums and movies with Cheech Marin , as well as playing the character Leo on Fox 's That '70s Show .