
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.

Souls for Sale
1923 · as Prop Man (uncredited)

Alice's Adventures in Wonderland
1910 · as Mad Hatter

The Totville Eye
1912 · as Young Sammy

The Title Cure
1913 · as Office Boy

Cartoons in a Seminary
1915 · as Jim Alder

The Active Life of Dolly of the Dailies #5: The Chinese Fan
1914 · as Daddy, the office boy

Papa's Sweetheart
1911 · as One of the Children

Revenge Is Sweet
1912 · as Jimmy - the Office Boy

Andy Goes on the Stage
1914 · as Jimmie Brown

How a Horseshoe Upset a Happy Family
1912 · as The Messenger Boy

The Actor's Children
1910 · as The Actor's Son

The Ransom of Red Chief
1911 · as Red Chief - The Little Boy