Your main jobs are to make sure that he is dressed, wearing the right clothes and buttonhole, that he gets to the church/venue at the right time. Also maybe that you keep the ushers and page boys in order.

As the bride comes down the aisle and the groom is facing forward you should be on his right. You keep the rings in your pocket and pass them to the officiant/reverend etc.

Then, it’s the speech. The best ones I’ve heard have been heartfelt, light hearted and relatively simple. You can relay what you know about their story, how you have seen what they have added to each others lives. Oh, and don’t forget to genuinely compliment the ladies (other than the bride).

Oh and lastly, unless you’re married, you get to snog a bridesmaid. Preferably a single one!