Grace Kelly, the film-star wife of Rainier of Monaco, died suddendly in 1982. How did she die?

Explanation

Grace Patricia Kelly married Rainier III, Prince of Monaco in April 1956. She embarked on her action career aged 20, and retired from acting at 26 to enter upon her duties in Monaco. She died on September 14, 1982, two months before her 53rd birthday, when she lost control of her car and crashed after suffering a stroke. Her daughter Princess Stéphanie, who was in the car with her, survived the accident.