A Look Back At Prince William And Kate Middleton's Relationship In Photos

Prince William and Kate Middleton have hit a big relationship milestone: a decade of marriage.

The pair tied the knot on April 29, 2011, at Westminster Abbey in London. A million people lined the city streets, hoping to catch a glimpse of the couple, while many more around the world watched the day unfold on TV.

The newlyweds sharing a moment on the balcony of Buckingham Palace following their wedding at Westminster Abbey on April 29, 2011, in London. (Photo: Mark Cuthbert via Getty Images)
The newlyweds sharing a moment on the balcony of Buckingham Palace following their wedding at Westminster Abbey on April 29, 2011, in London. (Photo: Mark Cuthbert via Getty Images)

A wedding guest from Kate’s hometown of Bucklebury, England, told People magazine that upon the bride’s arrival at the church, “everything outside just roared.”

“You could hear it all outside to begin with as she approached,” Martin Fidler said of the royal wedding entrance. “It was like a wave of sound getting louder and louder as she got closer to the Abbey. When the trumpets started inside to announce that she’d arrived, it’s a wonder the roof didn’t lift off!”

A decade later, we look back at Will and Kate’s 20-year relationship history from their college days to parenthood and more.

2001 - 2005

The college sweethearts met while they were students at the University of St. Andrews in Scotland in 2001. During their second year, they <a href="https://www.britannica.com/event/British-Royal-Wedding-of-2011" target="_blank" rel="noopener noreferrer">shared a townhouse</a> with two other friends. It wasn't until 2003, though, that the pair reportedly began dating. They were able to keep their relationship hush-hush until they were <a href="https://www.eonline.com/ca/news/816251/remember-the-first-time-prince-william-and-kate-middleton-were-photographed-together-and-the-drama-that-ensued" target="_blank" rel="noopener noreferrer">photographed together on a ski trip</a> in 2004. (Kate is pictured here on their graduation day in June 2005).

2006

The couple sneaks a kiss after a March 2006 sporting event at Eton College, the boarding school the prince attended as a teen.
The couple sneaks a kiss after a March 2006 sporting event at Eton College, the boarding school the prince attended as a teen.
Things are getting serious! Then-girlfriend Kate attends the wedding of William's stepsister <a href="https://www.cbsnews.com/pictures/duchess-daughter-weds/" target="_blank" rel="noopener noreferrer">Laura Parker Bowles</a> in May 2006.
Things are getting serious! Then-girlfriend Kate attends the wedding of William's stepsister Laura Parker Bowles in May 2006.

2007

Kate spends time with William and his brother, Prince Harry, while cheering on England at a February 2007 rugby championship match.
Kate spends time with William and his brother, Prince Harry, while cheering on England at a February 2007 rugby championship match.
After a brief breakup in the spring of 2007, William and Kate (seen here sitting in first and third rows, respectively) reunite at the Concert for Diana at Wembley Stadium on July 1, 2007 &mdash; which would have been the late Princess Diana's 46th birthday.
After a brief breakup in the spring of 2007, William and Kate (seen here sitting in first and third rows, respectively) reunite at the Concert for Diana at Wembley Stadium on July 1, 2007 — which would have been the late Princess Diana's 46th birthday.

2008

William <a href="http://edition.cnn.com/2008/WORLD/europe/04/11/prince.william/index.html" target="_blank" rel="noopener noreferrer">receives his Royal Air Force wings</a> at a graduation ceremony in April 2008. Kate is by his side to celebrate the accomplishment.

2010

William and Kate attend the October 2010 wedding of their friends Harry Meade and Rosie Bradford in Northleach, England.
William and Kate attend the October 2010 wedding of their friends Harry Meade and Rosie Bradford in Northleach, England.
The future Duke and Duchess of Cambridge officially announce their engagement in November 2010. William proposed during a trip to Kenya the month prior with a sapphire and diamond engagement ring that had belonged to his mother, the late Princess Diana.
The future Duke and Duchess of Cambridge officially announce their engagement in November 2010. William proposed during a trip to Kenya the month prior with a sapphire and diamond engagement ring that had belonged to his mother, the late Princess Diana.

2011

The couple wave to well-wishers after attending a naming ceremony for a new royal lifeboat in February 2011. It was their first official appearance after the announcement of their engagement.
The couple wave to well-wishers after attending a naming ceremony for a new royal lifeboat in February 2011. It was their first official appearance after the announcement of their engagement.
The pair return to the University of St. Andrews &mdash; where they first fell in love &mdash; to help launch a <a href="https://abcnews.go.com/International/Royal_Wedding/royal-wedding-prince-william-kate-middleton-st-andrews/story?id=12997303" target="_blank" rel="noopener noreferrer">scholarship in their honor</a> in February 2011.
The new Duke and Duchess of Cambridge smile following their royal wedding ceremony at Westminster Abbey on April 29, 2011.
The new Duke and Duchess of Cambridge smile following their royal wedding ceremony at Westminster Abbey on April 29, 2011.
A month after their nuptials, Will and Kate meet with then-President Barack Obama and first lady Michelle Obama at Buckingham Palace in May 2011.
A month after their nuptials, Will and Kate meet with then-President Barack Obama and first lady Michelle Obama at Buckingham Palace in May 2011.

2013

A growing family! The Duke and Duchess of Cambridge welcome their first child, <a href="https://www.huffpost.com/life/topic/prince-george" target="_blank" rel="noopener noreferrer">Prince George</a>, in July 2013. He is third in line to the throne behind his grandfather Charles and father William.

2015

Nearly two years later, on May 2, 2015, the couple welcome their second child, Princess Charlotte. She is fourth in line to the throne behind her older brother, George.
Nearly two years later, on May 2, 2015, the couple welcome their second child, Princess Charlotte. She is fourth in line to the throne behind her older brother, George.

2018

And then there were five! On April 23, 2018, Kate gives birth to another boy. Their third child, Prince Louis, is fifth in line to the throne.
And then there were five! On April 23, 2018, Kate gives birth to another boy. Their third child, Prince Louis, is fifth in line to the throne.
In this candid shot, William and Kate share a laugh as they depart Windsor Castle after the <a href="https://www.huffpost.com/entry/meghan-markle-prince-harry-wedding-anniversary_n_5ec2b6ffc5b64bc3dc943183" target="_blank" rel="noopener noreferrer">royal wedding of Harry and Meghan Markle</a> on May 19, 2018.

2018

The Duke and Duchess of Cambridge and their three children leave church after Prince Louis's christening in London on July 9, 2018.
The Duke and Duchess of Cambridge and their three children leave church after Prince Louis's christening in London on July 9, 2018.

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This article originally appeared on HuffPost and has been updated.