Bill and Hillary Clinton: 40 years of married life

• Bill and Hillary Clinton: 40 years of married life

Former US President Bill Clinton and his wife Hillary Clinton, who will participate in the US presidential election of the Democratic Party in 2016, celebrated 40 years of marriage. Bill and Hillary tied the knot 11 October 1975.

Bill and Hillary Clinton: 40 years of married life

Bill and Hillary Clinton on their wedding day in Fayetteville, Arkansas, October 11, 1975.

Bill and Hillary Clinton: 40 years of married life

The Governor of Arkansas Bill Clinton, his wife Hillary Clinton and their newborn daughter Chelsea, March 5, 1980.

Bill and Hillary Clinton: 40 years of married life

The Governor of Arkansas Bill Clinton, his wife, Hillary Rodham Clinton and their daughter Chelsea during the inauguration of the city of Little Rock, Arkansas, September 20, 1991.

Bill and Hillary Clinton: 40 years of married life

Budding presidential candidate of the Democratic Party, Bill Clinton and his wife Hillary Rodham Clinton in Blake's Restaurant restaurant in Manchester, New Hampshire, February 15, 1992.

Bill and Hillary Clinton: 40 years of married life

Governor Bill Clinton and his wife Hillary Clinton at a meeting with voters in the final day of campaigning in McAllen, Texas, 1992.

Bill and Hillary Clinton: 40 years of married life

US President Bill Clinton and First Lady Hillary Clinton listen to Karl Kregora, which explains why his family is afraid of losing health insurance in Washington, DC, September 16, 1993.

Bill and Hillary Clinton: 40 years of married life

President Bill Clinton gives a whistle, which marks the official start of the annual Easter egg rolling at the White House in Washington, April 12, 1993.

Bill and Hillary Clinton: 40 years of married life

The US President Bill Clinton and First Lady Hillary Clinton counsel before his speech with a speech about health care in Edison, NJ, February 16, 1994.

Bill and Hillary Clinton: 40 years of married life

President Bill Clinton and First Lady Hillary Clinton in a national park Grand Teton, Wyoming, August 26, 1995.

Bill and Hillary Clinton: 40 years of married life

Hillary Clinton hugs Bill Clinton after the presidential debate at the University of San Diego, October 16, 1996.

Bill and Hillary Clinton: 40 years of married life

Bill Clinton and Hillary Clinton goes to church in Washington, DC, January 7, 1996.

Bill and Hillary Clinton: 40 years of married life

US President Bill Clinton dances with his wife, Hillary Rodham Clinton at the inaugural ball in Washington January 20, 1997.

Bill and Hillary Clinton: 40 years of married life

Hillary Clinton visits the Clinton Hospital Bethesda Naval Hospital after undergoing surgery on their knee, March 14, 1997.

Bill and Hillary Clinton: 40 years of married life

Bill and Hillary Clinton sent to board Marine One, to spend a weekend at the resort "The Hamptons", July 31, 1998.

Bill and Hillary Clinton: 40 years of married life

US President Bill Clinton and First Lady Hillary Clinton mourn during the remembrance of the victims in the embassy at the airbase, "Andrews" in Maryland, August 13, 1998.

Bill and Hillary Clinton: 40 years of married life

President Bill Clinton and Hillary Clinton in Aspen, Colorado, July 24, 1999.

Bill and Hillary Clinton: 40 years of married life

President Bill Clinton, his wife Hillary Clinton and their daughter Chelsea near the Lincoln Memorial in Washington, DC, January 1, 2000.

Bill and Hillary Clinton: 40 years of married life

Former US President Bill Clinton and his wife, Senator Hillary Rodham Clinton, at a charity event in Washington, DC, March 20, 2007.

Bill and Hillary Clinton: 40 years of married life

Former US President Bill Clinton, accompanied by his wife, Senator Hillary Rodham Clinton, who gives interviews to the media in New York, November 6, 2006.

Bill and Hillary Clinton: 40 years of married life

A candidate for the presidency of the Democratic Party, Hillary Clinton and her husband, Bill Clinton, greet supporters in New York, June 3, 2008.

Bill and Hillary Clinton: 40 years of married life

The banker Marc Mesvinski, US Secretary of State Hillary Clinton, Chelsea Clinton and former President Bill Clinton. This photograph was taken at the wedding of Chelsea and Marc in Reinbek, New York, July 31, 2010.

Bill and Hillary Clinton: 40 years of married life

Former US President Bill Clinton and former US Secretary of State Hillary Clinton on the 37th Festival of fried steak Harkin Steak Fry in Indianola, Iowa, September 14, 2014.

Bill and Hillary Clinton: 40 years of married life

Bill, Hillary, Chelsea Clinton and Marc Mesvinski greet people during a meeting on Roosevelt Island in New York, June 13, 2015.