An American royalty, Grace Kelly was a fashion icon and a Hollywood superstar that has gained fame in films like Rear Window and To Catch a Thief. But it was her fairytale wedding to Prince Rainier III of Monaco that cemented her status as Princess of Monaco at the age of 26. Her royal life was cut short when she died in a car crash on September 13, 1982. She was driving home to Monaco when she suffered a stroke while on the wheels and lost control of the car. She suffered critical injuries but she died on the next day, so said motoringmojo.com.