Yes, Uncle! is a musical comedy by Austen Hurgon and George Arthurs, with music by Nat D. Ayer and lyrics by Clifford Grey (who also wrote The Bing Boys are Here and the following series of highly successful reviews). The story is based on the farce Le truc du Brésilien by Nicolas Nancey and Paul Armont, and the musical takes its title from the catch-phrase used by Bobby Summers and Mabel Mannering, addressing Uncle Brabazon Hollybone. It was produced by George Grossmith, Jr. and Edward Laurillard and opened at the Prince of Wales Theatre in London on 16 December 1917 and ran for a very successful 626 performances. The piece starred Fred Leslie as G.B. Stark, Margaret Bannerman as Joan and Leslie Henson as Bobby Summers. Later, Madge Elliott and Cyril Ritchard starred in the musical.