Cheers is an American television sitcom, created by Glen Charles & Les Charles and James Burrows, that aired on NBC for 11 seasons from September 30, 1982, to May 20, 1993. The show was produced by Charles/Burrows/Charles Productions in association with Paramount Television. The show is set in the titular bar in Boston, where a group of locals meet to drink, relax, socialize, and escape from their day-to-day issues.

At the center of the show is the bar's owner and head bartender, Sam Malone, who is a womanizing former relief pitcher for the Boston Red Sox. The show's ensemble cast introduced in the pilot episode are waitresses Diane Chambers and Carla Tortelli, second bartender Coach Ernie Pantusso, and regular customers Norm Peterson and Cliff Clavin. Later main characters of the show also include Frasier Crane, Woody Boyd, Lilith Sternin, and Rebecca Howe.

After premiering in 1982, it was nearly canceled during its first season when it ranked almost last in ratings for its premiere (74th out of 77 shows). However, Cheers eventually became a Nielsen ratings juggernaut in the United States, earning a top-10 rating during eight of its 11 seasons, including one season at number one (season 9). The show spent most of its run on NBC's Thursday night "Must See TV" lineup. Widely watched, its series finale in 1993 became the most-watched single TV episode of the 1990s, and the show's 275 episodes have been successfully syndicated worldwide. Nominated for Outstanding Comedy Series for all 11 of its seasons on the air, it earned 28 Primetime Emmy Awards from a record of 117 nominations.

During its run, Cheers became one of the most popular series in history and received critical acclaim from its start to its end and is frequently cited as one of the greatest television shows of all time. In 1997, the episodes "Thanksgiving Orphans" and "Home Is the Sailor," aired originally in 1987, were respectively ranked No. 7 and No. 45 on TV Guide's 100 Greatest Episodes of All Time. Its series finale was watched by an estimated 93 million viewers, almost 40% of the US population at the time. The series also produced three spin-offs: The Tortellis, Wings, and Frasier; and a Spanish remake.