Kate attended the exclusive Marlborough College before studying art history in Scotland.
Miss Middleton is the eldest daughter of Carole, left, and Michael Middleton, who run a mail order toy business.
Kate met Prince William in 2001 when studying at St Andrews University, Fife. They shared accommodation during their four years at university and went on holiday together.
She was brought to the public's attention after several tabloids pictured her beside Prince William and Charles at the Swiss ski resort of Klosters in 2005.
Miss Middleton quickly became a fashion trendsetter, wearing high street clothes as well as designer outfits.
Speculation about an engagement was at a height when Miss Middleton celebrated her 25th birthday in January this year.
Miss Middleton was a guest when William was commissioned as an officer in the army, the first occasion that she was seen at a high-profile public event attended by the Queen.
Miss Middleton complained to the Press Complaints Commission in March after the publication of a paparazzi picture of her going to work.
Miss Middleton attended the Cheltenham Race Festival last month, along with Prince William.