Trivia

May be the only Jewish actor to have played Adolf Hitler three times - in The Desert Fox, The Magic Face and The Twilight Zone.

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.

One of six children of Jacob P. Adler

Brother of Jay Adler and Stella Adler.

Granduncle of Tom Oppenheim (the son of Ellen Adler).

Uncle of Ellen Adler.

Biography in: "The Scribner Encyclopedia of American Lives". Volume One, 1981-1985, pages 7-9. New York: Charles Scribner's Sons, 1998.

He was a lifelong liberal Democrat.

He has an entry in Jean Tulard's 'Dictionnaire du Cinéma/Les Acteurs' published in Paris in 2007 by Robert Laffont/Bouquins (pg. 12).