Natalie Wood
The star of iconic movies like Miracle on 34th St and Rebel Without a Cause, the Hollywood leading lady had a demise shrouded in mystery. In 1981, while on a boat in Santa Catalina Island with her husband Robert Wagner and a young Christopher Walken, Wood drowned in a mysterious accident.

Wood and Wagner fought angrily before boarding the yacht, and the next day Wood's body was found a mile away from the boat, floating by an inflatable boat taken from the yacht. The autopsy later showed that she had a cocktail of pain meds, motion sickness pills, and a blood alcohol level of 0.14%, though her official cause of death was drowning and hypothermia. It was never found out if she simply fell off the boat or if foul play was involved.