The Prince and Princess of Wales recently celebrated their 15 year wedding anniversary, but the couple have been together for more than two decades, since meeting at university. The pair may have been teenagers when they met at St Andrews, but it was the beginning of a love story that would last - and shape royal history along the way.

As we all know, the Princess of Wales didn't begin life as a royal, and was born Catherine 'Kate' Middleton to her parents Carole and Michael in Berkshire. When the couple eventually tied the knot in 2011, Kate's dad revealed the moment when he realised just how serious Prince William was about his daughter.

london, england april 29: catherine middleton with the father michael middleton waves as she arrives to attend her royal wedding to prince william of wales at westminster abbey on april 29, 2011 in london, england. the marriage of the second in line to the british throne is to be led by the archbishop of canterbury and will be attended by 1900 guests, including foreign royal family members and heads of state. thousands of well wishers from around the world have also flocked to london to witness the spectacle and pageantry of the royal wedding. (photo by christopher furlong/getty images)
Christopher Furlong
Princess of Wales with her father on her wedding day.
london, england april 29: their royal highnesses prince william duke of cambridge and catherine duchess of cambridge exit westminster abbey after their royal wedding on april 29, 2011 in london, england. the marriage of the second in line to the british throne is to be led by the archbishop of canterbury and will be attended by 1900 guests, including foreign royal family members and heads of state. thousands of well wishers from around the world have also flocked to london to witness the spectacle and pageantry of the royal wedding. (photo by ian gavan/gp/getty images)
Ian Gavan/GP
Prince William and Kate on their wedding day.

The Prince and Princess married in a spectacular ceremony at Westminster Abbey which was broadcast to millions around the world. After the public event, however, the couple were able to unwind with family and friends to celebrate their special day in private.

london, england april 29: prince william exchanges rings with his bride catherine middleton in front of the archbishop of canterbury, rowan williams inside westminster abbey on april 29, 2011 in london, england. the marriage of prince william, the second in line to the british throne, to catherine middleton is being held in london today. the marriage of the second in line to the british throne is to be led by the archbishop of canterbury and will be attended by 1900 guests, including foreign royal family members and heads of state. thousands of well wishers from around the world have also flocked to london to witness the spectacle and pageantry of the royal wedding. (photo by andrew milligan wpa pool/getty images)
WPA Pool

Since then, insiders present at the event have revealed details about what happened at the reception, including touching moments from the speeches. According to The Times, Michael's father of the bride speech included a moving - and surprising - anecdote about an event which took place back in 2008. 'I knew things were getting serious when I found a helicopter in my garden,' he told the guests. 'I thought gosh, he must like my daughter. I did wonder then how he was going to top this.' Prince William is a trained RAF pilot, and recently revealed he still flies regularly.

london, england june 12: (l r) prince william, duke of cambridge, catherine, duchess of cambridge and prince harry during the patrons lunch celebrations for the queens 90th birthday at the mall on june 12, 2016 in london, england. (photo by jeff spicer/getty images)
Jeff Spicer

In his own speech, Prince William is reported to have referred to Kate as his 'rock', a sentiment he has repeated in recent years, reiterating how 'proud' he is of her. True to form, the best man speech was a little cheekier, led by Prince Harry. According to The Times, he joked about his brother's fading hairline and referred to the couple as the 'Dude and Duchess'. The Prince and Princess of Wales' former titles were the Duke and Duchess of Cambridge, until King Charles took to the throne.

london, united kingdom may 13: prince harry, catherine, duchess of cambridge and prince william, duke of cambridge laugh as they host a tea party in the grounds of buckingham palace to honour the children of those who have died serving in the armed forces on may 13, 2017 in london, england. (photo by andrew parsons wpa pool/getty images)
WPA Pool

The music on the couple's big night was provided by singer Ellie Goulding, who Prince William and Kate are both fans of, and ended with a firework display. Rumours of afterparties in both Princess Margret's bathroom and a prestigious hotel are said to have taken place, before the newlyweds were helicoptered away by one of Prince William's RAF colleagues.