Bob Livingston's father was a newspaper editor in Quincy, Illinois. As a reporter for the Los Angeles Daily News Bob did a story on the Pasadena Playhouse, and that got him interested in acting. In his mid-20s, he was doing bit parts for Universal and Fox and went from there to romantic roles with MGM. His first real success came with Republic, in 1936, as a masked hero in the serial Zorro l'indomptable (1936). That led to more cowboy roles and the leading role in the "Three Mesquiteer" series. He had more appearances (29) in that series than anyone else. He played other cowboy roles (Zorro in The Bold Caballero (1936)), worked with Al St. John in the "Lone Rider" Series (1941-43) and finished up in a number of character parts in Gene Autry and Roy Rogers movies.