Grace Patricia Kelly (November 12, 1929 – September 14, 1982) was an American actress who became Princess of Monaco after marrying Prince Rainier III, in April 1956.

After embarking on an acting career in 1950, at age 20, Kelly appeared in New York City theatrical productions and more than 40 episodes of live drama productions broadcast during the early 1950s Golden Age of Television. In October 1953, she gained stardom from her performance in the film Mogambo, which won her a Golden Globe Award and an Academy Award nomination in 1954. Subsequently, she had leading roles in five films, including The Country Girl (1954), for which her deglamorized performance earned her an Academy Award for Best Actress. Other films include High Noon (1952) with Gary Cooper, Dial M for Murder (1954) with Ray Milland, Rear Window (1954) with James Stewart, To Catch a Thief (1955) with Cary Grant, and High Society (1956) with Frank Sinatra and Bing Crosby.

Kelly retired from acting at the age of 26 to marry Rainier and began her duties as Princess of Monaco. They had three children: Caroline, Albert II, and Stéphanie. Kelly retained her American roots, maintaining dual U.S. and Monégasque citizenship. She died on September 14, 1982, a day after suffering a stroke while driving her car, which caused a crash.