Mr. Belvedere is an American sitcom that originally aired on ABC from March 15, 1985, until its cancellation following the 107th episode on December 30, 1989. The network then shelved the remainder of Season 6. ABC aired the show's two-part series finale on July 8, 1990, a rare occurrence for a canceled program. The eight remaining episodes from Season 6 that the network shelved (bringing the final number of episodes to 117) would eventually air in syndication.

The series is based on the Lynn Aloysius Belvedere character created by Gwen Davenport for her 1947 novel Belvedere, which was later adapted into the 1948 film Sitting Pretty. The show stars Christopher Hewett as the title character, a butler for an American family headed by George Owens, played by Bob Uecker.

The series follows posh English butler Lynn Belvedere as he struggles to adapt to the Owens household in suburban Pittsburgh. The breadwinner, George (Bob Uecker), is a sportswriter (in the pilot he worked in construction). His wife Marsha (Ilene Graff) is attending law school. At the show's start, older son Kevin (Rob Stone) is a senior in high school, daughter Heather (Tracy Wells) is a freshman and Wesley (Brice Beckham) is in elementary school.

Over the course of the series, George becomes a sportscaster (a career shared with Uecker, who balanced his role as the longtime play-by-play announcer for the Milwaukee Brewers while starring in the series), Marsha graduates from law school and starts a career as a lawyer, Kevin leaves for college and gets his own apartment, Heather moves up in high school and Wesley moves to junior high school.

Several episodes deal with the relationship between Wesley and Mr. Belvedere, who are always at odds, with Wesley constantly antagonizing Belvedere. Deep down, they are revealed to really love each other. Belvedere is the only one who can tame Wesley. Throughout the series, Mr. Belvedere serves as a mentor of sorts to Wesley as well as to the other children. Being a cultured man with many skills and achievements (having even once worked for Winston Churchill), he also helps the Owenses solve their dilemmas and avoid trouble. Each episode, except "Deportation Part 1" (Season 3) and "The Counselor" (Season 4), ends with Mr. Belvedere writing in his journal, recounting the events of the day (with audio narration) with the Owens family and what he has learned.

Belvedere's penchant for junk food is shown in many episodes. Another recurring gag features George always trying to be initiated into a local charity club called the Happy Guys of Pittsburgh. Wesley's acrimonious relationship with the never-seen next-door neighbors the Hufnagels (whose first names all began with the letter H) is another recurring plot element.

The series occasionally included very special episodes, such as Season 2's "Wesley's Friend", in which one of Wesley's classmates contracts HIV via factor VIII treatment for hemophilia.

The character of Lynn Belvedere was originally created by Gwen Leys Davenport in her 1947 novel Belvedere. The following year, the title character was portrayed by Clifton Webb in the film Sitting Pretty, which told the story of an arrogant genius who answers an employment advertisement for a babysitter for three bratty kids. He accepts the job because he is secretly writing a novel about a community of gossips and busybodies. Webb earned an Academy Award nomination for Best Actor for his performance and reprised the role in two other films, Mr. Belvedere Goes to College (1949) and Mr. Belvedere Rings the Bell (1951).