Félix Marie Henri Tilkin, better known by his pen name Ivan Caryll, was a Belgian-born composer of operettas and Edwardian musical comedies in the English language, who made his career in London and later New York. He composed some forty musical comedies and operettas.

The Toreador is an Edwardian musical comedy in two acts by James T. Tanner and Harry Nicholls, with lyrics by Adrian Ross and Percy Greenbank and music by Ivan Caryll and Lionel Monckton. It opened at the Gaiety Theatre in London, managed by George Edwardes, on 17 June 1901 and ran for an extremely successful 675 performances. It starred Marie Studholme, Gertie Millar, Harry Grattan, Edmund Payne, George Grossmith, Jr. and the young Sidney Bracy. Gabrielle Ray later joined the cast. The show also enjoyed Broadway runs in 1902 and 1904 and toured internationally.