Biography in: "The Scribner Encyclopedia of American Lives". Volume One, 1981-1985, pages 7-9. New York: Charles Scribner's Sons, 1998.
Granduncle of Tom Oppenheim (the son of Ellen Adler).
He has an entry in Jean Tulard's 'Dictionnaire du Cinéma/Les Acteurs' published in Paris in 2007 by Robert Laffont/Bouquins (pg. 12).
May be the only Jewish actor to have played Adolf Hitler three times - in The Desert Fox, The Magic Face and The Twilight Zone.
One of six children of Jacob P. Adler
Uncle of Ellen Adler.
When his older sister Stella Adler went to Hollywood and signed with Metro-Goldwyn-Mayer, the studio changed her name to Stella Ardler. Luther, whose acting career was primarily on the stage, asked her why M.G.M. hadn't changed her name to Beverly Wilshire.