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.

The duo released many successful comedy record albums, and starred in a series of low-budget films, becoming a successful comedy team. Some of their best-known comedy routines and songs include "Earache My Eye", "Basketball Jones", "Santa Claus and His Old Lady", and "Sister Mary Elephant". Perhaps their most famous line is "Dave's not here", from their self-titled debut album.

Their early success culminated with the release of their first feature-length movie, Up in Smoke, in 1978. Relatively successful, it became something of a cult classic and was successful enough to warrant a sequel, Cheech & Chong's Next Movie, in 1980, and Nice Dreams in 1981. These were followed by Things Are Tough All Over (1982) and Still Smokin' (1983). The pair attempted to shy away from stoner comedy with 1984's Cheech & Chong's The Corsican Brothers but the film was universally panned by critics and fans alike.

Tommy Chong directed four of their films, while co-writing and starring in all seven with Cheech Marin.

They also appeared in smaller supporting roles in Graham Chapman's Yellowbeard and Martin Scorsese's After Hours.

In 1985 the duo released their album Get Out of My Room, which included the novelty hit song, "Born in East L.A." (based on Bruce Springsteen's "Born in the U.S.A."). This song would later serve as the basis for the 1987 film of the same name, in which Cheech Marin played the starring role. Immediately following the release of the album, Cheech Marin separated himself from the pair's drug-inspired act by working on a solo career.