Thespis
Original programme
Written by	W. S. Gilbert (words) Arthur Sullivan (music)
Date of premiere	26 December 1871
Place of premiere	Gaiety Theatre London, England
Original language	English
Subject	Greek mythology
Genre	Operetta
Setting	Mount Olympus

Thespis, or The Gods Grown Old is an operetta by Gilbert and Sullivan. It is the first of their fourteen operettas. It was commissioned in 1871 by John Hollingshead, manager and owner of the Gaiety Theatre in the Strand. It was not well rehearsed, and lasted only 65 performances. It was generally well received by the critics.