Thespis is an operatic extravaganza that was the first collaboration between dramatist W. S. Gilbert and composer Arthur Sullivan. It was never published, and most of the music is now lost. However, Gilbert and Sullivan went on to become one of the most famous and successful partnerships in Victorian England, creating a string of comic opera hits, including H.M.S. Pinafore, The Pirates of Penzance and The Mikado, that continue to be popular. Thespis premièred in London at the Gaiety Theatre on 26 December 1871. Like many productions at that theatre, it was written in a broad, burlesque style, considerably different from Gilbert and Sullivan's later works. It was a modest success—for a Christmas entertainment of the time—and closed on 8 March 1872, after a run of 63 performances. It was advertised as "An entirely original Grotesque Opera in Two Acts". The story follows an acting troupe headed by Thespis, the legendary Greek father of the drama, who temporarily trade places with the gods on Mount Olympus, who have grown elderly and ignored. The actors turn out to be comically inept rulers. Having seen the ensuing mayhem down below, the angry gods return, sending the actors back to Earth as "eminent tragedians, whom no one ever goes to see".