Gallagher & Shean was a highly successful musical comedy double act in vaudeville and on Broadway in the 1910s and 1920s, consisting of Ed Gallagher (1873–1929) and Al Shean (1868–1949); Shean was the maternal uncle of the Marx Brothers.

A double act is a form of comedy originating in the British music hall tradition, and American vaudeville, in which two comedians perform together as a single act, often highlighting differences in their characters' personalities. Pairings are typically long-term, in some cases for the artists' entire careers. Double acts perform on the stage, television and film.