The Odd Couple is a play by Neil Simon. Following its premiere on Broadway in 1965, the characters were revived in a successful 1968 film and 1970s television series, as well as several other derivative works and spin-offs. The plot concerns two mismatched roommates: the neat, uptight Felix Ungar and the slovenly, easygoing Oscar Madison. Simon adapted the play in 1985 to feature a pair of female roommates in The Female Odd Couple. An updated version of the 1965 show appeared in 2002 with the title Oscar and Felix: A New Look at the Odd Couple.

The Colonial Theatre in Boston, Massachusetts, opened in 1900, is the oldest continually-operating theatre in the city. It is located at 106 Boylston Street on Boston Common at the former site of the Boston Public Library. It is a pending Boston Landmark.