For the first time ever, we have two Irish teams at the same international tournament.
But while it's been a long time since the North have been on the big stage, the Republic have had their fair share of summer tournaments since making their debut at Euro '88.
Ahead of their opening Euro 2016 game against Sweden on Monday afternoon, we decided to test our readers on their knowledge of the Boys in Green.
How many of these legendary Irish footballers can you name?
