One of the official wedding portraits of Prince William and Kate Middleton.

With the news that the Duchess of Cambridge, otherwise known as Kate Middleton, is pregnant with Prince William's first child, join us for a look at the lovely couple through the years.

Kate Middleton, age 3 1/2, on a family vacation

Prince William is seen making a royal salute as he watches a scene of the Trooping the Color from the balcony of Buckingham Palace with his brother, Harry, and mother, Princess Diana, in London in this June 15, 1985, file photograph.

The Prince and Princess of Wales and family outside Manor House at Eton College with housemaster Dr. Andrew Gailey on Prince William's first day at the school, September 1995.

The Prince and Princess of Wales on holiday with their children, Princes William and Harry, at the Spanish royal residence Marivent Palace, August 1987.

Diana, Princess of Wales, is seen arriving at a memorial service with her sons Princes William, left, and Harry during the 50th anniversary of the Blitz of London in this October 1990 file photograph.

Prince William stands in this photo, one of a series officially released by St. James Palace, to mark the prince's 18th birthday.

An official royal portrait released to the media on June 21, 2003, of Britain's Prince William in celebration of his 21st birthday.

Prince William stands with his father, Prince Charles, Sept. 21, 2001, in Glasgow, Scotland.

Britain's Prince William, right, marches during the Sovereign's Parade at the Royal Military Academy in Sandhurst, southern England, Dec. 15, 2006. Prince William graduated that day as an army officer to launch his military career.

Kate Middleton and Prince William on their graduation day at St. Andrews University in June 2005

Prince William and Kate Middleton watch the action during the RBS Six Nations Championship rugby match between England and Italy on Feb. 10, 2007, in London, England.

Kate Middleton arrives at Westminster Abbey for her marriage to Britain's Prince William in central London on April 29, 2011.

Prince William and Middleton wave as they board a Canadian Air Force jet at the end of their royal tour of Canada in Calgary on July 8, 2011.

Middleton poses with Prince William during a reception before Queen Elizabeth's Diamond Jubilee lunch at Windsor Castle in London on May 18, 2012.

Prince William and Kate Middleton attend the naming ceremony and service of dedication of the Hereford Endeavour. This was their first official duty after becoming engaged.

Prince William and Catherine, the Duchess of Cambridge, look at orchid hybrids named in their honor at the National Orchid Garden in the Singapore Botanic Gardens on Sept. 11, 2012.

Catherine, the Duchess of Cambridge, visits the Kranji Commonwealth War Cemetery in Singapore on Sept. 13, 2012.

Middleton plays field hockey with the Great Britain hockey teams at the Riverside Arena in the Olympic Park in London on March 15, 2012.