Donegal native Erin was first called up to the Ireland WNT squad for the training camp in Marbella, Spain in November 2022 and was an un-used substitute in the International Friendly against Morocco.

The Peamount United midfielder then returned to the squad for the pre-World Cup training camp in June 2023.

Erin made her debut in the 3-2 win over Zambia in Tallaght Stadium. She made her first start away to Albania in October 2023.