Nell O'Day was an accomplished American equestrian and B-movie actress of the 1930s and 1940s.

The Three Mesquiteers is the umbrella title for a Republic Pictures series of 51 American Western B-movies released between 1936 and 1943. The films, featuring a trio of Old West adventurers, was based on a series of Western novels by William Colt MacDonald. The eponymous trio, with occasional variations, were called Stony Brooke, Tucson Smith and Lullaby Joslin. John Wayne, who played Stony Brooke in eight of the films in 1938 and 1939, was the best-known actor in the series. Other leads included Bob Livingston, Ray "Crash" Corrigan, Max Terhune, Bob Steele, Rufe Davis and Tom Tyler.