Robert Livingston may refer to:

Max Terhune (12 February 1891 – 5 June 1973 Cottonwood, Arizona), was an American film actor. He appeared in nearly 70 films, mostly B-westerns, between 1936 and 1956.

Terhune, who was born in Franklin, Indiana, performed in 21 episodes of a popular Republic Studios western series called The Three Mesquiteers. His character, Lullaby Joslin, was launched by another popular character actor, Syd Saylor, but then Terhune stepped into the series which, involving 12 different actors, lasted for a total of 51 pictures over eight years. His co-stars in 15 of the pictures were Robert Livingston and Ray "Crash" Corrigan. He then worked with Corrigan and John Wayne, who took over Livingston's role shortly before Wayne's career was launched by his starring role in "Stagecoach". Terhune and Corrigan went on to work together in another trio western series, The Range Busters (24 entries with Ray Corrigan and John King at Monogram Pictures). He did several supporting roles with Gene Autry (at Republic). It was Autry, with whom he had worked in radio in Chicago, who convinced him to come to Hollywood. Later he worked in Johnny Mack Brown westerns at Monogram. Terhune played the comic sidekick (Lullaby Joslin in the Mesquiteers movies and usually a character called Alibi thereafter)--with a major distinction. He always traveled the range with his dummy Elmer sharing his saddle.

Al St. John (September 10, 1893 – January 21, 1963) in his persona of Fuzzy Q. Jones basically defined the role and concept of "comical sidekick" to cowboy heroes from 1930 to 1951. St. John also created a character, "Stoney," in the first of a continuing Western film series, The Three Mesquiteers, that was later played (at a low point in his own career) by John Wayne.

Born in Santa Ana, California, St. John entered silent films around 1912 and soon rose to co-starring and starring roles in short comic films from a variety of studios. His uncle, Roscoe "Fatty" Arbuckle, may have helped him in his early days at Mack Sennett Studios, but talent kept him working. He was slender, sandy-haired, handsome and a remarkable acrobat.

St. John frequently appeared as Arbuckle's mischievously villainous rival for the attentions of leading ladies like Mabel Normand, and worked with Arbuckle and Charles Chaplin in The Rounders (1914). The most critically praised film from St. John's period with Arbuckle remains Fatty and Mabel Adrift (1916) with Normand.