It's a fact your wedding day is a big day in your life and you will be excited and a bit vervous, which brings on butterflies. First, think of nerves as excitement and it makes them more acceptable.
Then understand what's happening. When you're nervous your body releases adrenalin and redirects blood to your muscles ready for the fight-or-flight response. This is what causes butterfies in your stomach.
Take 3 really deep slow breaths at a time. Really deep breaths to the bottom of your lungs and out again.
By taking deep breaths you send good doses of oxygen in for the rest of your body, which helps reduce butterflies and effects of nerves.
Also drop your shoulders. Tension often goes to your shoulders and they can become hunched. So I might say to you to give your shoulders a big shrug, right up to your ears and then drop them.
Do it a couple of times. It'll also make you all laugh. You'll be amazed how much better you feel (and look) after that.