You will need a pair of sharp snips or heavy shears to cut the twigs. And you will also need some pussy willows which are native to our north east.
The trick is to know where they grow.
If you are having a spring wedding you will be in luck as this is when they are blooming.
If the event is later in fall or winter you can force them to bloom by cutting shoots from last years growth and placing the stems in water.
The buds will swell and blossom in a few days to a week.
As soon as the pussy willows are open remove them from the water and let them dry.