Leon Schlesinger, who in addition to creating and overseeing the Warner Bros. animation unit, also produced films for the studio's B-western unit. He signed a broad-shouldered young actor named John Wayne partly out of his physical resemblance to Warners' silent-era cowboy star Ken Maynard in order to more easily match the stunts and footage taken from the earlier Maynard silents that were to be inserted into a series of remakes of those films, of which this is one.
Although he was most often cast as Italians, Luis Alberni was actually born in Spain, thus his accent here is mostly authentic.
The priest conducting the marriage is dressed in the robes of the Franciscan padres, who founded the missions along El Camino Real.