Anthony Boyle

as Arthur Guinness

8 episodes

Louis Partridge

as Edward Guinness

8 episodes

Emily Fairn

as Anne Guinness

8 episodes

Fionn O'Shea

as Benjamin Guinness

8 episodes

James Norton

as Sean Rafferty

8 episodes

Niamh McCormack

as Ellen Cochrane

8 episodes

Seamus O'Hara

as Patrick Cochrane

8 episodes

Jack Gleeson

as Byron Hughes

8 episodes

Dervla Kirwan

as Agnes Guinness

8 episodes

Michael McElhatton

as John Potter

8 episodes

Danielle Galligan

as Lady Olivia Hedges

8 episodes

David Wilmot

as Bonnie Champion

8 episodes

Hilda Fay

as Sultan

8 episodes

Jessica Reynolds

as Lady Christine O'Madden

6 episodes

Ann Skelly

as Adelaide 'Dodo' Guinness

5 episodes