Landau died at UCLA Medical Center in Los Angeles on Saturday, July 15 from unexpected complications during a short hospitalization for an undisclosed illness, publicist Dick Guttman said in a statement on Sunday.
His long career had remarkable ups and downs. He delivered acclaimed performances in movies by top directors including Francis Ford Coppola, Woody Allen and Tim Burton, was nominated three times for Oscars, and co-starred in the spy series "Mission: Impossible" in the 1960s alongside then-wife Barbara Bain.
But during career doldrums, the New York-born Landau languished in third-rate projects such as the laughable 1981 TV movie "The Harlem Globetrotters on Gilligan's Island" and the dispensable 1983 mutant monster movie "The Being."
"You know, I've always felt, pound for pound, I'm one of the best guys around; but you get stuck in people's eyes in a certain way, and it takes an imaginative director who will look at you and realize you can play different kinds of parts because you are an actor," Landau told the New York Times in 1988. "I don't like to sound immodest but I believe in what I can do."
Landau was named best supporting actor for his portrayal in "Ed Wood" of the fading, morphine-addicted Hungarian horrormeister Lugosi, star of "Dracula." The quirky cast in Burton's homage to fabled bad-movie director Wood included Johnny Depp, Bill Murray, Sarah Jessica Parker and wrestler George "The Animal" Steele.
"It's impossible to overestimate the job that Landau does here as this sepulchral Hungarian," Washington Post critic Hal Hinson wrote in his review of the 1994 film. "Both vocally and physically, he's simply astounding."
After winning the Oscar in March 1995, Landau gushed: "My God! What a night. What a life. What a moment. What everything!"
The tall, lanky Landau also was nominated for Oscars as best supporting actor for his role as a visionary carmaker's partner in Coppola's 1988 "Tucker: The Man and His Dream" - the role that revived his career - and as a man who kills his mistress in Allen's 1989 "Crimes and Misdemeanors."