May 2003: William and Kate are pictured deep in conversation at a rugby match.
June 2003: Clarence  House denies that William is romantically involved with close friend  Jecca Craig, the daughter of wealthy conservationists based in Kenya.
June 2003: Kate  attends William's 21st birthday party at Windsor Castle. The Prince  insists in an interview to mark his birthday that he does not have a  steady girlfriend.
September 2003: William, Kate  and their two flatmates move into a cottage in their third year of  university. It is not known exactly when William and Kate became an item  but rumoured to be around Christmas 2003.
March 2004: William  and Kate's romance is exposed after they are pictured on the ski slopes  of Klosters together. Clarence House does not deny they are dating. On  the same holiday, William says: "I don't want to get married until I'm  at least 28 or maybe 30".
April 9, 2005: Kate is not invited to the wedding of the Prince of Wales and Camilla Parker Bowles in Windsor.
June 2005: Kate joins William at the wedding of his close friend Hugh van Cutsem.
June 2005: William and Kate graduate in the same ceremony at St Andrews and attend a celebratory lunch together joined by their families.
July 2005: The pair enjoy a romantic holiday at the Lewa Downs game reserve in Kenya, owned by the parents of Jecca Craig.
October 2005: Kate's  lawyers - the same used by the Prince of Wales - ask newspaper editors  to leave her alone, claiming she is being hounded by photographers.
Autumn 2005: There are reports that the relationship has cooled off.
November 2005: William tells an All Blacks rugby player at a Palace reception that the relationship is going well.
January 2006: William  is photographed kissing Kate in public for the first time during a  skiing break in Klosters. Days later, William begins his Army training  at the Royal Military Academy, Sandhurst.
March 2006: Kate,  without William, is invited into the Royal Box at the Cheltenham Gold  Cup. Also there are the Prince of Wales and the Duchess of Cornwall.
April 2006: Kate's lawyers make further complaints to newspapers and picture agencies after she is photographed on a shopping trip.
April 2006: The pair holiday on the Caribbean hideaway island of Mustique. They are snapped on a yacht together.
May 2006: William and Kate attend the wedding of the Prince's stepsister, Laura Parker Bowles.
August 2006: They holiday in Ibiza ahead of William's final term at Sandhurst.
November 2006: Kate gets a job as an accessories buyer with Jigsaw, the fashion chain owned by friends of her family.
December 2006: Kate makes her most significant appearance to date as she turns up to watch William graduate as an Army officer at Sandhurst.
January 2007:  Kate's lawyers try to persuade newspaper editors to stop using  paparazzi pictures of her after she is confronted by a media scrum  outside her home on her 25th birthday. There are reports that legal  action is being considered.
March 2007: William  starts Army training at Camp Bovington, Dorset. The pair are pictured at  the Cheltenham Gold Cup together. Kate makes her first official  complaint to the Press Complaints Commission over alleged harassment in  connection with a photo used in the Daily Mirror. She later settles the  matter after an apology from the paper.
April 14, 2007: William and Kate are confirmed to have split.
June 2007: Speculation mounts that the couple are back together after they are seen kissing and dancing together at an Army party.
July 1, 2007: Kate joins William at the Wembley Stadium Concert for Diana, fuelling rumours that the couple are back together.
July 11 2007: The  Media and Sport Select Committee accuses the Press Complaints  Commission of failing to help protect Kate from "clear and persistent  harassment" by the paparazzi.
October 2007: William  and Middleton are photographed out on the town together for the first  time since their split. Kate joins William at Balmoral for a private  weekend with Charles and Camilla. At the same time, the Prince voices  concern after he and Kate are "aggressively" pursued in their car by the  paparazzi.
August 2007: Security concerns force Kate to pull out of a Dover to Calais Chinese dragon boat race.
April 11, 2008: Kate  appears at William's side at his graduation ceremony from the RAF,  suggesting the couple's relationship is now permanent and has the  approval of senior royals.
May 17, 2008: Kate attends the wedding of William's cousin, Peter Phillips, to Autumn Kelly. William attends another wedding in Africa.
June 16, 2008:  Kate attends the Order of the Garter service at Windsor Castle to watch  William taking part. It is the first time she has appeared at a formal  and official Royal public occasion.
June 22, 2008: William  marks his 26th birthday by playing side by side with his brother Harry  in a charity polo match, with Kate watching from the sidelines. The  celebrations continued with a private party at Prince Charles's home at  Highgrove.
July 19, 2008: Kate attends her second royal wedding of the year without William. She is present at the marriage of Lady Rose Windsor.
September 2008:  Kate dons hot pants and legwarmers at a charity roller disco she  co-organised. She is pictured lying on her back after falling on the  rink. Christmas and New Year 2008: The couple holiday at the royal  retreat of Birkhall, the Prince of Wales's home on the Queen's private  Balmoral estate in Scotland.
May 2009: The couple are pictured together for the first time in five months after being spotted at a polo match.
July 2009: They are snapped kissing outside a pub.
December 2009:  The Queen's lawyers warn newspapers against publishing paparazzi photos  of the Royal family, fuelling speculation William and Kate are to wed.
January 2010: The pair take a New Year break at Birkhall.
January 15, 2010:  Kate watches as William graduates on an advanced helicopter training  course and receives his flying badge from the Prince of Wales.
February 2010: William remarks "You'll have to wait a while yet" when asked by a member of the public about the prospect of a royal wedding.
March 2010:  The couple holiday with Kate's family on the slopes of Courchevel,  France. Kate gives an insight into her childhood in an online question  and answer session on her parents' firm's website. The link is later  removed after the details are reported.
October 2010: Kate and William are photographed attending the Gloucestershire wedding of a friend.
November 16: The couple's engagement announced in a brief statement released by Clarence House.