Prince William and Kate enrolled at the University of St Andrews in Scotland in September 2001 and became friends. They both lived at St Salvator's Hall residence, but it wasn't until the following year in 2002 that a spark grew.
The pair were pictured publicly together for the first time in 2004 when Kate accompanied William on a family ski trip to Klosters in Switzerland.
During their dating years, the couple attended sports events, concerts and friends' weddings together, with Kate also present for some of William's biggest public moments, including his graduation from Sandhurst in 2006.
HELLO! takes a look at some of the best photos from William and Kate's early years of their relationship before their 2011 wedding…
William and Kate are renowned for their love of sports, and the pair were animated as they cheered on England during the RBS Six Nations Championship match against Italy at Twickenham in February 2007. The pair were joined by William's younger brother, Prince Harry.
Who can forget when William and Kate rocked matching green tweed ensembles at Cheltenham Festival in 2007? The royal girlfriend wore a co-ordinating skirt suit by Katherine Hooker with Chanel sunglasses.
The couple briefly broke up in 2007, and William said of their split in their 2010 engagement interview: "We were both very young. It was at university, we were sort of both finding ourselves as such and being different characters and stuff, it was very much trying to find our own way and we were growing up."
Kate added: "At the time, I wasn't very happy about it but actually it made me a stronger person," and she later said she "valued" that time for herself.
But the pair sparked rumours of a reconciliation when Kate attended the Concert for Diana at Wembley Station on 1 July 1997, on what would have been the late Princess of Wales's 46th birthday. She was seated two rows behind her future husband, as they sang along to the likes of Take That.
Four years after their first public picture, the couple enjoyed a skiing holiday in Klosters, Switzerland in March 2008. The Cambridges have since enjoyed ski trips with their children.
A shy Kate was present for William's graduation ceremony at RAF Cranwell in April 2008. While William was dressed in his military uniform, his girlfriend opted for a white Reiss coat, which she has reworn on several occasions, including last year on the couple's tour of Ireland.
Kate proudly watched as William graduated from RAF Shawbury in January 2010, where he was awarded his wings as a fully-fledged helicopter pilot. The Prince of Wales and the Duchess of Cornwall were also present at the ceremony.
William and Kate attended Harry Meade and Rosie Bradford's wedding in Gloucestershire in October 2010, shortly before they announced their own engagement.
The future royal bride looked stunning in a blue dress by Issa – strikingly similar to the style she would wear for her engagement photocall.
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