Ein Herz und eine Seele is a German cult sitcom based on the British sitcom Till Death Us Do Part by Johnny Speight. The show premiered on January 15, 1973 and lasted for about twenty episodes, airing its last on November 4, 1974. In 1976, the show had a short-lived revival with another four episodes. Ein Herz und eine Seele was written by Wolfgang Menge.

The show was extremely successful during its initial run and it still proves very popular in reruns. Two episodes in particular, Silvesterpunsch and Rosenmontagszug have gained such popularity that they are now shown traditionally on German TV on New Year's Eve and Rosenmontag, respectively.