Gabriel Byrne as Samuel Beckett

Aidan Gillen as James Joyce

Sandrine Bonnaire as Suzanne

Fionn O'Shea as Young Samuel

Maxine Peake as Barbara

Bronagh Gallagher as Nora Barnacle

Lisa Dwyer Hogg as May Beckett

Caroline Boulton as Sylvia Beach

Gráinne Good as Lucia Joyce

Cillian Hollywood as 5 year old Samuel

Patrik Piró as Adam

Léonie Lojkine as Younger Suzanne

Andrew Hefler as Leon

Barry O'Connor as William Beckett

Caleb Johnston-Miller as 10 year old Samuel

Robert Aramayo as Alfred Peron

Rebecka Johnston as Woman 1

Szabolcs Kelemen as Prudent

Laurent Winkler as King Gustav

Jenni Bowden as Woman 2

Júlia Szász as Mania

Francis McBurney as M

László Aranyossy as Priest

Ildikó Hidasi as Lady with dog

Dávid Mester as Resistance member #3 (uncredited)