New York-born Boss was one of the screen's first child stars. He was already a stage veteran when he made his screen debut in Thanhouser's The Actor's Children (1910). He appeared on Broadway opposite Adeline Genée in The Silver Star. Later he became one of Edison Studios's most popular players, but the studio constantly had to battle rumors questioning his true age. Boss's popularity waned in the late 1910s and he later worked as a prop man.
1923
as Prop Man (uncredited)
1915
as Jim Alder
1914
as Jimmie Brown
1914
as Daddy, the office boy
1913
as Office Boy
1912
as The Messenger Boy
1912
as Young Sammy
1912
as Jimmy - the Office Boy
1911
as One of the Children
1911
as Red Chief - The Little Boy
1910
as Mad Hatter
1910
as The Actor's Son