For the first and second Irish Film and Television Awards ceremonies, supporting performances for film and television were combined into one category. Up until the 2018–2019 film season, awards were given for films released in Ireland the previous year.
Winners and nominees
2000s
2010s
2020s
Statistics
Multiple wins
3 wins: Saoirse Ronan
2 wins: Fionnula Flanagan
Multiple nominations
4 nominations: Saoirse Ronan Ger Ryan
3 nominations: Kerry Condon Sinéad Cusack Fionnula Flanagan
2 nominations: Niamh Algar Caitríona Balfe Jessie Buckley Elaine Cassidy Anne-Marie Duff Amy Huberman Ruth Negga Nora-Jane Noone Deirdre O'Kane Catherine Walker Eileen Walsh