 On the 28th of May, 2018, Crichton was named to make his debut for New South Wales off the interchange bench in Game 1 of the 2018 State of Origin series at Melbourne Cricket Ground.Crichton played in all 3 matches for New South Wales as the blues won their first origin shield since 2014.Crichton made his debut for the Sydney Roosters against his old club South Sydney in Round 1 of the 2019 NRL season at the Sydney Cricket Ground which ended in a 26-16 loss.