Prince Harry and Chelsy Davy

Prince Harry and Chelsy Davy laugh as they attend Prince Harry's Pilot Course Graduation at the Army Aviation Centre on May 7, 2010, in Andover, England.

Chelsy Davy attends Prince Harry's Pilot Course Graduation at the Army Aviation Centre on May 7, 2010, in Middle Wallop, England.

Britain's Prince Harry walks with his girlfriend Chelsy Davy after receiving his Helicopter Pilot's wings from his father, Prince Charles, in a graduation ceremony from an advanced helicopter training course at Middle Wallop, England, Friday May 7, 2010.

Prince Harry and his girlfriend Chelsea Davy laugh before the Investec Challenge international rugby match South Africa vs. England in Twickenham, west London, on November 22, 2008.

Prince Harry and Chelsy Davy attend the Investec Challenge match between England and South Africa at Twickenham on Nov. 22, 2008, in London, England.

Prince Harry talks to Chelsy Davy, who was born in Zimbabwe, before an international rugby match between England and South Africa at Twickenham stadium in west London, Saturday, Nov. 22, 2008.

Prince Harry and Chelsy Davy leave a service of remembrance and thanksgiving at the Holy Trinity Church on May 5, 2008, in Windsor, England.

Prince Harry's girlfriend Chelsy Davy sits with Prince William and Prince Charles in May of 2008 as Prince Harry is presented with his campaign medal for his service in Afghanistan.

Prince Harry, center, Chelsy Davy, left, and Prince William, right, wave their hands up in the air at the Concert for Diana on July 1, 2007, at London's Wembley stadium.

Prince Harry and girlfriend Chelsy Davy watch the Concert for Diana at Wembley Stadium on July 1, 2007, in London.

Prince Harry and Chelsy Davy share a kiss at the Concert for Diana at Wembley Stadium on July 1, 2007, in London.

Prince Harry and Chelsy Davy attend the Cricket World Cup Super 8s match between England and Australia at the Sir Vivian Richards Stadium in St Peter's, Antigua, Sunday April 8, 2007.

Prince Harry kisses his girlfriend Chelsy Davy at the Cricket World Cup Super 8s match between England and Australia at the Sir Vivian Richards Stadium in St Peter's, Antigua, Sunday April 8, 2007.

Prince Harry and girlfriend Chelsy Davy attend the Cartier International Polo match on July 30, 2006 in Egham, England.