Princess Toto is a three-act comic opera by W. S. Gilbert and his long-time collaborator Frederic Clay. Its pre-London tour opened on 24 June 1876 at the Theatre Royal, Nottingham, starring Kate Santley, W. S. Penley and J. H. Ryley. It transferred to the Royal Strand Theatre in London on 2 October 1876 for a run of only 48 performances. Brief New York and Boston runs followed in 1879–80 starring Leonora Braham and Ryley, and there were later tours in the US. Princess Toto was revived in 1881 at the Opera Comique in London for a run of 65 performances (starring Richard Temple). There was also an 1886 revival in Australia.