The Co Down golfer is to tie the knot with American Erica Stoll on Saturday, April 22, in Ashford Castle in Cong, Co Mayo.
And Rory (27) has revealed that he'd have worn the prestigious green jacket from the Masters on his wedding day if he'd won the title.
Golf's biggest names are expected to fly to Ireland for what insiders have already dubbed the "wedding of the decade".
His family, including proud parents Gerry and Rosie, are also travelling to Mayo for their son's wedding.
Rory and Erica have spent two New Year's Eves in the five-star hotel where they enjoyed candle-lit dinners and Champagne as the clock counted down.
Rory said: "We're very excited. It's a great time in our lives, and it's all about that over the next couple of weeks."