Gaiety Girls were the chorus girls in Edwardian musical comedies, beginning in the 1890s at the Gaiety Theatre, London, in the shows produced by George Edwardes. The popularity of this genre of musical theatre depended, in part, on the beautiful dancing corps of "Gaiety Girls" appearing onstage in bathing attire and in the latest fashions. The 1890s Gaiety Girls were respectable, elegant young ladies, unlike the actresses from London's earlier musical burlesques. Later, even the stars of these musical comedies were referred to as Gaiety Girls.

Edwardian musical comedy was a form of British musical theatre that extended beyond the reign of King Edward VII in both directions, beginning in the early 1890s, when the Gilbert and Sullivan operas' dominance had ended, until the rise of the American musicals by Jerome Kern, Rodgers and Hart, George Gershwin and Cole Porter following the First World War.