Two American college football teams are going head to head at the Aviva Stadium tonight.
The game between US Navy and Notre Dame has resulted in around 40,000 American tourists landing in Dublin for the weekend. It's the largest single movement of Americans to a sporting event overseas.
The teams last met in the Aviva Stadium in 2012.
This morning, US Navy held a training session at Na Fianna GAA Club in Glasnevin, ahead of the match tonight.
There are a number of events taking place beforehand to celebrate the game, with US Navy and Africa Band performing at the top of Grafton Street at 3 pm, and the US Air Force holding a flyover before the game.
Areas of the city center, including Dame Street, which has been temporarily renamed Notre Dame Street, are closed to traffic to allow for the festivities to take place throughout the day.
Kick-off for the match is said to be around 7:30 this evening, but anyone lucky enough to have tickets is advised to arrive early, get in their seats, and enjoy the experience that can be had before the game starts.