Jesse Armstrong Creator, Executive Producer Brian Cox Logan Roy Actor Jeremy Strong Kendall Roy Actor Sarah Snook Siobhan "Shiv" Roy Actor Kieran Culkin Roman Roy Actor Alan Ruck Connor Roy Actor Hiam Abbass Marcia Roy Actor Nicholas Braun Greg Actor Matthew Macfadyen Tom Actor Natalie Gold Rava Roy Actor Peter Friedman Frank Actor J. Smith-Cameron Gerri Actor Dagmara Domińczyk Karolina Actor Arian Moayed Stewy Actor Fisher Stevens Hugo Baker Actor Justine Lupe Willa Ferreyra Actor David Rasche Karl Muller Actor Adam McKay Executive Producer Frank Rich Executive Producer Kevin J. Messick Executive Producer Will Ferrell Executive Producer Jane Tranter Executive Producer Mark Mylod Executive Producer Tony Roche Executive Producer Scott Ferguson Executive Producer