Before Kate Middleton married Prince William and became the Duchess of Cambridge, she was a commoner. Join us for a look at her through the years.
Kate Middleton, age 3 1/2, on a family vacation
Kate Middleton, 4, her father and sister Pippa in Jerash, Jordan
Kate Middleton, age 5
Kate Middleton on the day she graduated from St. Andrews University in June 2005
Kate Middleton and Prince William on their graduation day at St. Andrews University in June 2005
A picture of Kate Middleton wearing a see-through knitted lace dress at the annual St. Andrew's University charity fashion show in 2002 is on show next to a mannequin displaying the creation.
Kate Middleton after the wedding of Camilla Parker Bowles' daughter Laura at St. Cyriac's Church in Lacock, in Wiltshire, west England, on May 6, 2006.
Kate Middleton leaves her Chelsea flat on her 25th birthday on Jan. 9, 2007, in London, England.
Kate Middleton watches play on Court One at the Wimbledon tennis championship in London on July 2, 2007.
Kate Middleton watches the David Nicholson Mares Hurdle on day four of the Cheltenham festival at Cheltenham Racecourse on March 14, 2008, in Cheltenham, England.
Prince William and Kate Middleton pose for photographs in the State Apartments of St. James Palace on Nov. 16, 2010, in London. The couple's engagement was announced that day.
One of two official engagement photographs of Prince William and Kate Middleton.
In addition to their more formally posed photograph, Prince William and Kate Middleton released this more casual engagement photo.
Kate Middleton and Prince William make their first public outing after announcing their engagement, arriving for a fundraiser on Dec. 18, 2010, in Fakenham, England.
Prince William applauds as Kate Middleton pours champagne over the Hereford Endeavour during a naming ceremony and service of dedication for the Royal National Lifeboat Institution's Atlantic 85 Lifeboat in north Wales on Feb. 24, 2011.
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.
Kate Middleton strokes a dog during a visit to St. Andrews University on Feb. 25, 2011.
Britain's Prince William and Kate Middleton speak to a wedding florist, during a visit to the Greenmount Agriculture & Food College in Antrim, Northern Ireland, on March 8, 2011.
Kate Middleton flips a pancake during a visit with Prince William to City Hall in Belfast, Northern Ireland, on March 8, 2011.
Kate Middleton meets with well-wishers following a visit with Prince William to Darwen Aldridge Community Academy in Darwen, northern England, on April 11, 2011. Prince William and Middleton were there to officially open the Academy.
Kate Middleton smiles during the visit to Darwen Aldridge Community Academy.
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, newly branded Catherine, Duchess of Cambridge, kiss on the balcony of Buckingham Palace following following their wedding.
Middleton and Prince William applaud after Andy Murray of Britain defeated Richard Gasquet of France on Centre Court at the Wimbledon tennis championships in London on June 27, 2011.
Middleton takes part in Canada Day celebrations on July 1, 2011, in Ottawa.
Middleton talks to guests at a reception in aid of the National Memorial Arboretum Appeal at St. James's Palace in London on Nov. 10, 2011.
Middleton plays field hockey with the Great Britain hockey teams at the Riverside Arena in the Olympic Park in London on March 15, 2012.
Middleton poses with Prince William during a reception before Queen Elizabeth's Diamond Jubilee lunch at Windsor Castle in London on May 18, 2012.
The Duchess of Cambridge watches the London 2012 Paralympic Games rowing finals events at Eton Dorney in southern England on Sept. 2, 2012.
Catherine, Duchess of Cambridge, visits Assyakirin Mosque on the fourth day of Prince William, Duke of Cambridge and Catherine, Duchess of Cambridge's Diamond Jubilee Tour of the Far East on Sept. 14, 2012, in Kuala Lumpur, Malaysia.
Prince William and the Duchess of Cambridge leave King Edward VII Hospital, where she was hospitalized with acute morning sickness, on Dec. 6, 2012. Middleton's four-day hospital stay led the Royal Family to announce that she was pregnant with the couple's first child.
Prince William and the Duchess of Cambridge welcome their first child, a son, on July 22, 2013.
The Duchess of Cambridge and Prince William introduce their son to the world outside the Lindo Wing of St. Mary's Hospital on July 23, 2013. The couple appeared on the same steps where Diana, Princess of Wales, and Prince Charles gave the world its first sighting of Prince William 31 years ago.
Catherine, Duchess of Cambridge, visits the Breakwater country park in Anglesey, north Wales, on Aug. 30, 2013, to start the Ring O Fire ultra marathon.
Britain's Prince William carries his son Prince George, as he arrives with his wife Catherine, Duchess of Cambridge for their son's christening at St James's Palace in London on Oct. 23, 2013.
Catherine, Duchess of Cambridge helms an America's Cup yacht as she races Prince William, Duke of Cambridge in Auckland Harbor on April 11, 2014, in Auckland, New Zealand. The Duke and Duchess of Cambridge were on a three-week tour of Australia and New Zealand, the first official trip overseas with their son, Prince George of Cambridge.
Catherine, Duchess of Cambridge, Prince William, Duke of Cambridge and Prince George of Cambridge look on before boarding a Royal Australian Air Force plane for their flight to Australia at Wellington Airport's military terminal on April 16, 2014, in Wellington, New Zealand.
Catherine, Duchess of Cambridge holds Prince George of Cambridge as Prince William, Duke of Cambridge looks on while meeting a bilby named George in honor of the prince at Taronga Zoo on April 20, 2014m in Sydney, Australia.
Prince William, Duke of Cambridge, and Catherine, Duchess of Cambridge, walk through the "Hall of Faces," which contains photos of those who died in the Sept. 11 terrorist attacks, during a visit to the National September 11 Memorial & Museum in New York City on Dec. 9, 2014.
Catherine, Duchess of Cambridge leaves the Christmas Day Service at Sandringham Church on Dec. 25, 2014, in King's Lynn, England.