Selected in the Ireland under-20s squad for the 2019 Six Nations Under 20s Championship, Hodnett started the wins against England, Scotland, Italy, France, and Wales, as Ireland secured their first grand slam in the tournament since 2007. He was retained in the under-20s squad for the 2019 World Rugby Under 20 Championship when it was confirmed in May 2019, and started in the opening win against England and the defeat against Australia, before a knee injury brought an end to his participation in the tournament.