Rainier III, Prince of Monaco Rainier III, Prince of Monaco Rainier III (Rainier Louis Henri Maxence Bertrand Grimaldi; 31 May 1923 – 6 April 2005) ruled the Principality of Monaco for almost 56 years, making him one of the longest ruling monarchs in European history. Though internationally known for his marriage to American actress Grace Kelly, he was also responsible for reforms to Monaco's constitution and for expanding the principality's economy beyond its traditional casino gambling base. Gambling accounts for only approximately three percent of the nation's annual revenue today; when Rainier ascended the throne in 1949, it accounted for more than 95 percent. Rainier
Rainier III, Prince of Monaco in Monaco were on 18 April 1956 (civil) and 19 April 1956 (religious). Their children are: In 1979, Prince Rainier made his acting debut alongside his wife Grace in a 33-minute independent film called "Rearranged", produced in Monaco. According to co-star Edward Meeks, after premiering it in Monaco, Grace showed it to ABC TV executives in New York in 1982, who expressed interest if extra scenes were shot to make it an hour long. However, Grace died in a car crash caused by a stroke in 1982, making it impossible to expand the film for American release. Rainier then may