Marilyn Monroe Arthur Miller in a car

Marilyn Monroe's longest marriage was with third husband Arthur Miller. The two were complete opposites: a movie star sex symbol in love with a cerebral, award-winning playwright. But in the end, Miller, just like second spouse Joe DiMaggio, wasn't enough for the fragile actress. In addition to marital stressors like failed pregnancies, misunderstandings and clashes over work, Monroe's demons, evinced in her drinking and drug use, proved impossible to escape.