Keye starred with his future Kung Fu co-star Benson Fong in Charlie Chan At The Opera (1936).
Played on three television series simultaneously at one point; Kung Fu, Anna And The King, and The Amazing Chan And The Chan Clan.
Entered film business as a commercial artist and movie poster designer.
He was originally considered for the role of Obi-Wan Kenobi in Star Wars: Episode IV - A New Hope (1977).
Continued making films until his death at 86, only two weeks after Woody Allen's Alice (1990), which he worked in, was released.
Finally played Charlie Chan almost 40 years later after playing his son, voicing him in the animated series "The Amazing Chan And The Chan Clan" (1972).
Was the only Asian actor to play Asian lead detectives in the 1930s/1940s era.
Known in his later years for vocal work on animation, doing many roles.
When doing the final two Charlie Chan films, as Chan's Number One Son, he was 44 years old, and actually five months older than Roland Winters, who played Chan.