Possible Clues:

• "East of Eden" co-star
• "Rebel Without a Cause" star
• ''Rebel Without a Cause'' star
• *Short-lived screen icon who kept his sideburns short
• Actor who said 'Only the gentle are ever really strong'
• 'Being an actor is the loneliest thing in the world' speaker
• Actor, crashing, needs a fix first
• Yul Brynner beat him out for Best Actor of 1956
• Oscar nominee for playing Cal Trask
• '50s film 53 Down