Harry, who was the official best man at the 2011 wedding, had planned to make a cheeky joke about his new sister-in-law's "killer legs" during his speech.
However, his then-girlfriend Chelsy Davy thought the joke was inappropriate and advised him to remove it. Harry ultimately took her advice and removed the line from his speech.
Royal expert Katie Nicholl revealed in her book "Harry: Life, Loss and Love" that Chelsy had helped Harry edit his best man's speech.
She had advised him to take out the line about Kate's legs, which she felt could have embarrassed the bride.
Despite this, Harry's speech reportedly went down well with the guests, who laughed and cried throughout. He shared sweet stories and made jokes at his brother's expense.
One of the guests at the reception told the Sunday Times that Harry had made a "filthy" joke about wet knickers in his speech.
William also played a prank on his brother by tying a ladder to the back of the newlyweds' car after Harry fell off a ladder while trying to change a lightbulb.
Charlie van Straubenzee, a friend of William's, also gave a speech at the reception and made fun of Harry's ginger hair.
Overall, while Prince Harry had planned to make a joke about Kate's legs at her wedding, he ultimately decided not to include it in his speech after Chelsy Davy advised him against it.
