Mother: Princess Grace, formerly the actress Grace Kelly
Marriage: Charlene Wittstock (July 1, 2011-present)
Children: with Charlene Wittstock: Princess Gabriella Therese Marie and Prince Jacques Honore Rainier; with Nicole Coste: Eric Alexandre Stephane; with Tamara Rotolo: Jazmin Grace Rotolo.
Education: Amherst College, BA, 1981
Military service: French Navy
He is interested in environmental issues, alternative energy and hybrid vehicles.
An avid athlete, he has competed in five Winter Olympics
(1988, 1992, 1994, 1998, 2002) in the sport of bobsledding but has not won any medals.
He has been a member of the International Olympic Committee since 1985.
His two oldest children are not in line for the throne, because they were born out of wedlock.
March 31, 2005 - Monaco's Crown Council transfers the regency of the tiny kingdom to Prince Albert, the heir to the throne, saying that Prince Rainier can no longer carry out his duties as monarch.
April 6, 2005 - Prince Rainier III dies of organ failure and Prince Albert becomes Albert II, Sovereign Prince of Monaco.
July 6, 2005 - Publicly acknowledges paternity of his son, Alexandre, born to Nicole Coste, a flight attendant from Togo.
July 12, 2005 - Part one of the formal investiture as Monaco's ruler is Mass at St. Nicholas Cathedral, marking the end of the mourning period for Prince Rainier.
November 17, 2005 - Part two of the formal investiture is the enthronement ceremony at St. Nicholas Cathedral.
April 16, 2006 - Travels to the North Pole by dogsled to highlight global warming.
June 1, 2006 - Acknowledges paternity of his daughter, Jazmin Grace Grimaldi, born to an American former waitress, Tamara Rotolo.
March 2, 2007 - Presides over the opening ceremony in Paris of International Polar Year, a research program with a focus on the Polar Regions involving 50,000 scientists from 63 countries.
January 28, 2008 - Is named as one of the United Nations Environment Programme's (UNEP) "Champions of the Earth."