Three on a Spree (also known as Brewster's Millions) is a 1961 British comedy film directed by Sidney J. Furie and starring Jack Watling, Carole Lesley and John Slater. It is based on the 1902 novel Brewster's Millions by George Barr McCutcheon, which became the hit 1906 play written by Winchell Smith and Byron Ongley. It had been previously filmed by Edward Small in 1945.

The film was shot at Walton Studios. Its sets were designed by the art director John Blezard.