On September 13, 1982, Kelly was driving back to Monaco from her country home in Roc Agel when she had a stroke. As a result, she lost control of her car and drove off the steep and down the 120-foot mountainside. Her daughter, Stéphanie, who was in the passenger seat tried to regain control of the car but she failed.
After the crash, Kelly was taken to the Monaco Hospital (later named the Princess Grace Hospital Centre) with injuries to the brain and thorax and a fractured femur. She died the following night at 10:55 p.m. after her husband, Prince Rainier, chose to take her off life support.
