With his sister Doris Eaton Travis, Eaton made his Broadway debut in the 1918 version of Mother Carey’s Chickens. In a 1928 Broadway production called Skidding, which ran for 472 performances, Eaton created the role of Andy Hardy. Eaton acted in ten Broadway shows in total, including The Awakening and The Ziegfeld Follies of 1921, in which he shared the stage with W. C. Fields, A Royal Fandango, with Ethel Barrymore, Peter Pan, and Tommy. He also performed at vaudeville’s storied Palace Theatre; toured in plays like Don’t Count Your Chickens with Mary Boland; and acted in a dozen, mainly forgettable films in the late 1920s and early 1930s He began his film career in 1921, playing Wallace Reid as a child in Forever (1921), the first screen version of Gerald du Maurier’s play Peter Ibbetson. He successfully made the jump to ‘talkies’, and starred opposite Helen Twelvetrees as the correspondence-school detective in the comedy The Ghost Talks (1929), which was Fox Film Corporation’s first talking picture; and as Marguerite Churchill’s brother in Harmony at Home (1930). His last film was Sons of the Sea, an English film, in 1939. Offers from both Broadway and Hollywood dried up with the arrival of the Depression, and eventually Eaton turned to alcohol, as did his sisters Pearl and Broadway star, Mary Eaton. Mary died in 1948 of liver problems brought on by her drinking, and Pearl was tragically murdered a decade later, but, although the case was ruled a homicide the crime has never been solved.

Long after his showbiz career was over, Eaton served as a captain in the Army Air Corps in Foggia, Italy during World War II. Following the war, he went into business with his sister Doris, who operated a thriving Arthur Murray Dance Studios franchise in Detroit, and did occasional theatrical engagements. In 2003, with his sister Doris, he co-wrote an Eaton family memoir entitled The Days We Danced. He died the following year in Norman, Oklahoma at age of 94.