Emerging from Dublin’s artistic milieu as the son of noted pianist John O’Conor, he honed his craft at Trinity College’s Samuel Beckett Centre before earning a Fulbright scholarship to study at NYU Film School. Early screen work placed him opposite Liam Neeson in Lamb, and a Young Artist Award followed for his portrayal of a young Christy Brown in the Oscar-winning My Left Foot, earning praise fro…