Few events in life will be as nerve-wracking as your wedding day - except perhaps the day you're someone's best man.
Often it's the best man's speech that the guests are waiting for, because traditionally it's the one that's the most fun. You're likely to hear uncensored, embarrassing stories of the groom's youth, and even the bride might learn something new about their new husband.
But all of this means there's a lot of pressure on the best man. The royal wedding of Prince Harry and Meghan Markle takes place on Saturday, and if best man Prince William isn't prepared, his speech may fall flat - or he may be outshone by his sister-in-law-to-be, who is a professional actress.
Based on tips from experts, here are 11 rules you should follow to prepare for and deliver a winning best man's speech. After all, once your moment is over, you can finally enjoy the day.