250 lucky winners have been chosen at random from all the entries and an email has been sent to those lucky people.
Tickets for the Aviva Stadium Family Fun Open Day will be posted on Friday, June 11.
Check the inbox and if you did not win this one, well then better luck next time and don't forget you can still purchase tickets for the O2 Challenge - the first game at the Aviva Stadium on Saturday, July 31 - click here.
The Aviva Stadium Fun Day starts at 1 p.m.
Please note this is NOT an IRFU event. It has been organised by Aviva.
The Aviva Stadium Open Day will include:
Full Bar and Restaurant facilities
A wide range of Children's activites including bouncy castles, face painters, balloon artists and puppeteers.
Interactive tours and a Grand Finale event in the stadium bowl.
Barrettstown Camp is the designated Charity for the Aviva Stadium Open Day.