Opened in 1956. Closed December 31, 1961 after 1,512 performances — 6 years. Irma la douce is a 1956 French musical with music by Marguerite Monnot and lyrics and book by Alexandre Breffort. The musical premiered in Paris in 1956, and was subsequently produced in the West End in 1958 and on Broadway, by David Merrick, in 1960. The English lyrics and book (1958) are by Julian More, David Heneker, and Monty Norman. Wiki link