The world was wowed by the Duchess of Cambridge as she walked down the huge aisle of Westminster Abbey on her wedding day.
Both guests in the Abbey and the billions watching at home watched as she glided to the altar in her stunning Alexander McQueen bridal gown.
The last person in the venue to see Kate on her big day was her husband to be Prince William who stuck to tradition and faced ahead as she made her way down the aisle with her dad Michael.
However, one person was on hand to tell William just how beautiful Kate looked - and it was his brother and best man Prince Harry.
As he stood proudly next to his brother, Harry snuck a glance at the bride and gave a warning to William - telling him not to turn around.
According to the 2013 book Kate: A Biography, Harry told Wiliam: "Right, she is here now."
He then said of his sister-in-law: "Well, she looks beautiful, I can tell you that.”
Finally, when Kate reached William, it seems he wholeheartedly agreed with this brother.
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He told his wife: "You look beautiful."
Later this week, William and Kate will celebrate their 11th wedding anniversary - and in that time a lot has changed.
They've welcomed three beautiful children - Prince George, Princess Charlotte and Prince Louis.
But William's relationship with his brother and best man Harry has become very frosty.
A growing rift has opened up between the pair, with it reportedly sparked by William's concerns over Harry's fast-developing relationship with his now-wife Meghan Markle.
The tense row quickly boiled over - with Harry claiming his brother was "trapped" within the royal system during a bombshell interview with Oprah Winfrey after quitting as a senior royal.
Since leaving the UK in early 2020, Harry has only seen his brother twice - at the funeral of Prince Philip and at an unveiling of a statue of Diana - and just this week dodged a question about whether he missed his brother.
In the interview, filmed during the Invictus Games in the Netherlands with NBC's Hoda Kotb, Harry talked about the competition as well as about his secret meeting with his grandmother the Queen and life with Meghan and their children in California.
During the chat, Hoda asked Harry if he misses his family, who are all in the UK.
He told her: "Yes I think especially over the last two years, everybody has missed their family and that ability to get home and see them, of course.."
However, when she followed up by asking if he specifically missed his brother William and dad Prince Charles, he quickly changed the subject, before talking about missing his children Archie and Lilibet back home in California.
