William Mercer Cook, better known as Will Marion Cook, was an American composer, violinist, and choral director. Cook was a student of Antonín Dvořák. In 1919 he took his New York Syncopated Orchestra to England for a command performance for King George V of the United Kingdom, and tour. Cook is probably best known for his popular songs and landmark Broadway musicals, featuring African-American creators, producers, and casts, such as Clorindy, or The Origin of the Cake Walk (1898) and In Dahomey (1903). The latter toured for four years, including in the United Kingdom and United States.

In Dahomey: A Negro Musical Comedy is a landmark 1903 American musical comedy described by theatre historian Gerald Bordman as "the first full-length musical written and played by blacks to be performed at a major Broadway house." It features music by Will Marion Cook, book by Jesse A. Shipp, and lyrics by poet Paul Laurence Dunbar. It was written by Jesse A. Shipp as a satire on the American Colonization Society's back-to-Africa movement of the earlier nineteenth century.