Oscar winner Karl Malden died Wednesday of natural causes in his Brentwood, California. He was 97.

Born Mladen George Sekulovich, the Academy award winner starred in films alongside Marlon Brando such as A Streetcar Named Desire, On the Waterfront and One-Eyed Jacks and went on to star in more than 50 Hollywood films often as richly complex and dark characters.

Malden won the 1951 Academy Award for Best Supporting Actor for A Streetcar Named Desire and was nominated in 1954 for his supporting role in On the Waterfront. Malden was a past president of the Academy of Motion Picture Arts and Sciences. He was also awarded an Emmy for Outstanding Supporting Actor in a Limited Series for his performance as MacDonald’s father in-law, Freddy Kassab.