He had a major nose candy habit which further quickened his demise

Old Hollywood Blind:

This A-list actor who got his start on Broadway died an unexpected death, presumably from a heart condition he had since birth.

That’s only partly true.

He had a major nose candy habit which further quickened his demise.

Sometimes he would share the coke with that troubled actress/biopic subject whom he co-starred with frequently on and off screen.

Actor: Montgomery Clift (Occlusive coronary artery disease)
Actress: Liz Taylor

Source: http://www.crazydaysandnights.net