Fionn O'Shea as Nicholas Coughlan

Ann Skelly as Isabel Gore

Pierce Brosnan as William Coughlan

Helena Bonham Carter as Margaret Gore

Gabriel Byrne as Muiris Gore

Dónal Finn as Sean Gore

Olwen Fouéré as Nora Ni Liathain

Michelle Lucy as Sister Agnes

Imelda May as Bette Coughlan

Pat Shortt as John Flannery

Ferdia Walsh-Peelo as Peader O Luing

Jonathan French as Fr. Noel

Norma Sheahan as Mother Superior

Brid Ní Chumhaill as Mother Superior

Billy Lyons as Pendergast

Conor Dan Ryan as Mr. Curtin

Mary O'Driscoll as Aine

Anthony O'Boyle as Coman