Topsy-Turvy is a 1999 British musical period drama film written and directed by Mike Leigh, starring Jim Broadbent as W. S. Gilbert and Allan Corduner as Sir Arthur Sullivan, along with Timothy Spall, Lesley Manville and Ron Cook. The story concerns the 15-month period in 1884 and 1885 leading up to the premiere of Gilbert and Sullivan's The Mikado. The film focuses on the creative conflict between playwright and composer, and their decision to continue their partnership, which led to their creation of several more Savoy operas.

Allan Corduner is a British actor. Born in Stockholm to a German mother and a Russo-Finnish father, Corduner grew up in a secular Jewish home in London. After earning a BA (Hons) in English and Drama at Bristol University he trained at the Bristol Old Vic Theatre School. He has worked extensively on stage, TV, and film, both in the UK and in the United States. His voice is familiar from many BBC radio plays, audio books and TV documentaries.