The world watched on as Prince William married the beautiful Kate Middleton at Westminster Abbey in April 2011. The couple looked completely in love as they said their vows and shared a sweet kiss on the Buckingham Palace balcony.
Kate's life changed forever as she officially became the Duchess of Cambridge and joined the royal family, but the day also had a huge impact on best man Prince Harry's future.
At the time, he was in an on-off relationship with Chelsy Davy - a Zimbabwean layer who Harry had known since school. They were extremely good friends, and Chelsy supported Harry through some of the hardest times of his royal life.
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