A Troy Parrott spot-kick sealed a 1-0 win against Poland that sees the Republic of Ireland Under-17s head to this summer's UEFA European Championship as the only unbeaten team.
And as well as that, Colin O'Brien's young Boys in Green have only conceded one goal in their six matches on the qualification trail.
The penalty that was scored eight minutes into the second-half at the Stadion Miejski in Legnica guaranteed three points and top spot in Group 3.
Head coach O'Brien was delighted to end the campaign unbeaten.
"It's been a fantastic campaign. There was a lot of tension today with Poland looking to qualify too. The crowd were trying to get behind their team from the off.
"People in the squad are playing for places for the European Championships now. We made changes today and those player impressed. It's all about making the squad stronger ahead of the finals.
"The players can enjoy the next few days, but then the focus starts on the Finals. It's a great day today for youth football in Ireland."
The draw for the finals takes place in England on April 5th.