Beau Geste is an adventure novel by British writer P. C. Wren, which details the adventures of three English brothers who enlist separately in the French Foreign Legion following the theft of a valuable jewel from the country house of a relative. Published in 1924, the novel is set in the period before World War I. It has been adapted for the screen several times.

Percival Christopher Wren was an English writer, mostly of adventure fiction. He is remembered best for Beau Geste, a much-filmed book of 1924, involving the French Foreign Legion in North Africa. This was one of 33 novels and short story collections that he wrote, mostly dealing with colonial soldiering in Africa.