While most of the Irish contingent will arrive at Twickenham today wrapped up in green jerseys and winter coats, one fan is going for a more glamorous look.
The 22-year-old, who will be attending the post-match meal on the arm of her beau (below), said she will have no choice but to have her game face on.
"I probably won't wear a jersey just because I have to go straight to the dinner afterwards," Holly told the Herald. "I am going to wear a pair of black leather trousers, which will look acceptable with boots, and then I will have heels in my bag for afterwards.
While she will be party-ready at the possible Triple Crown decider today, Holly will cover up in a large warm coat as she cheers on her man.
"The one other thing I need to remember is my glasses because I have forgotten them a few times and then I wasn't able to see Cian at all," said Holly.
The striking brunette, who donned the green jersey to promote the new ¿6.5m Lotto jackpot, has been keeping busy with her modelling and updating her nutrition blog.