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.
Cartoons in a Seminary
(Jim)
The Title Cure
(Office Boy)
The Active Life of Dolly of the Dailies #5: The Chinese Fan
(Daddy, the office boy)
Alice's Adventures in Wonderland
(Mad Hatter)
Souls for Sale
(Prop Man (uncredited))
The Totville Eye
(Young Sammy)
The Actor's Children
(The Actor's Son)
Andy Goes on the Stage
(Jimmie Brown)
How a Horseshoe Upset a Happy Family
(The Messenger Boy)
Revenge Is Sweet
(Jimmy - the Office Boy)
Papa's Sweetheart
(One of the Children)
The Ransom of Red Chief
(Red Chief - The Little Boy)