Played Lt. Stone on the television series, The Streets of San Francisco, a role which garnered him four Emmy nominations. He is also famous for his Oscar winning role in A Streetcar Named Desire.
He was born with the name, Mladen Sekulovich, but he shortened it so that it could fit the theater's marquee signs.
During the 70's & 80's, he was a spokesperson for American Express.
He married Mona Greenberg in 1938 and they had two children, Mila and Carla.
He starred in the movie, On the Waterfront with Marlon Brando.