Flanders and Swann were a British comedy duo. Lyricist, actor and singer Michael Flanders (1922–1975) and composer and pianist Donald Swann (1923–1994) collaborated in writing and performing comic songs. They first worked together in a school revue in 1939 and eventually wrote more than 100 comic songs together.

Between 1956 and 1967, Flanders and Swann performed their songs, interspersed with comic monologues, in their long-running two-man revues At the Drop of a Hat and At the Drop of Another Hat, which they toured in Britain and abroad. Both revues were recorded in concert (by George Martin), and the duo also made several studio recordings.