It's often the most awaited of the wedding speeches and unless you're used to the odd bit of public speaking, making a best man's speech can be nerve wracking to say the least.
Here are some worthwhile things to remember before delivering some important words to your best mate's nearest and dearest.
1 Stay sober
It sounds silly but it's definitely worth remembering. Alcohol often flows at a wedding and while a little Dutch courage may be tempting it might not end well. Best to leave any heavy drinking until your deed is done.
2 Don't begin until it's quiet
The bride and groom, the wedding party and their guests will all want to hear this speech, they will have been looking forward to it (no pressure!).
Don't begin until it's quiet and you have every one's attention and don't be afraid to hush people politely before you begin.
3 Introduce yourself
The bride and groom and their closest friends may know who you are but not every guest will.
Introduce yourself and share a story or some history on how you know or met the groom and your current relationship with him.
4 Remember your thank yous
While being funny, cracking the odd joke and generally being an all round entertaining fellow might be the aim of the game, manners are important too.
Thank the happy couple for having given you the job - a compliment in the bride's direction wouldn't go amiss either.
5 Avoid sensitive stories
While stories about ex-girlfriends, old rugby tours and previous escapades may be tempting don't feel the pressure to take down your best friend.
It might gain a few laughs among some but making the groom, or particularly his bride, feel hugely uncomfortable or embarrassed is not actually what's required.
6 Find a heart warming story
You're painting a picture of the groom - particularly for the bride's parents and their friends and family.
Now is your chance to say what a great guy he is and why they're so lucky he is joining their family.
7 Have a structure
A chronological tale will help you move through the speech. Don't tell a tale from university and then move back to your school days.
Go from A to B and people will follow you with ease.
8 Try not to read straight from a sheet
Giving a speech, getting it right, being funny - it can be a lot to remember.
But watching someone read from a script can be awkward for an audience and make it hard for them to warm to you. Lots of practice before the day in remembering your words from just small pointers is the way forward.
9 Don't be crude
There are likely to be grandparents there. And aunts, uncles, old friends, elderly relatives and of course two sets of parents.
If you're not sure, just play it safe.
10 It's ok to improvise!
You know the groom better than most people in the room.
Speak from the heart and don't be afraid to develop a story or add something else in if you feel the situation arises.
Something meaningful and heartfelt will be best received.