This Sunday for the game between Cork and Dublin you can wish your county team good luck in a unique way.
The process is very simple. All you have to do is send in a picture of yourself in your county colours along with a short good luck message for the team and your name in less than 120 characters.
The best images sent in will then be shown on the two Big Screens in Croke Park on Sunday at the All-Ireland Hurling semi-final.
You can tweet your images directly to @officialgaa or they can also be emailed to firstname.lastname@example.org . Images must be sent before 2pm on Thursday, August 8.
Show off our county colours and support the team!