Roscoe Arbuckle. Roscoe Arbuckle was 33 in The Round-Up as 'Slim Hoover'.
Mabel Julienne Scott. Mabel Julienne Scott was 27 in The Round-Up as 'Echo Allen'.
Irving Cummings. Irving Cummings was 32 in The Round-Up as 'Dick Lane'.
Wallace Beery. Wallace Beery was 35 in The Round-Up as 'Buck McKee'.
Tom Forman. Tom Forman was 27 in The Round-Up as 'Jack Payson'.
Jean Acker. Jean Acker was 26 in The Round-Up as 'Polly Hope'.
Edward P. Sullivan. Edward P. Sullivan was 66 in The Round-Up as 'Bud Lane'.
Guy Oliver. Guy Oliver was 42 in The Round-Up as 'Uncle Jim Allen'.
Jane Wolfe. Jane Wolfe was 45 in The Round-Up as 'Josephine Allen'.
Buster Keaton. Buster Keaton was 25 in The Round-Up as 'Indian (uncredited)'.
George Melford. George Melford was 43 in The Round-Up as 'Director'
Paul P. Perry. Paul P. Perry was 28 in The Round-Up as 'Director of Photography'Tom Forman. Tom Forman was 27 in The Round-Up as 'Writer'