Jesse Armstrong Creator, Executive Producer, Writer Nicholas Braun Greg Actor Brian Cox Logan Roy Actor Kieran Culkin Roman Roy Actor Dagmara Domińczyk Karolina Actor Peter Friedman Frank Actor Justine Lupe Willa Ferreyra Actor Matthew Macfadyen Tom Actor David Rasche Karl Muller Actor Alan Ruck Connor Roy Actor J. Smith-Cameron Gerri Actor Sarah Snook Siobhan "Shiv" Roy Actor Fisher Stevens Hugo Baker Actor Jeremy Strong Kendall Roy Actor Hiam Abbass Marcia Roy Guest Star Natalie Gold Rava Roy Guest Star Arian Moayed Stewy Guest Star Alexander Skarsgård Lukas Matsson Guest Star 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, Director Tony Roche Executive Producer Scott Ferguson Executive Producer