Dev Patel character Gawain
Alicia Vikander character Lady / Essel
Joel Edgerton character Lord
Sarita Choudhury character Mother
Sean Harris character King
Kate Dickie character Queen
Barry Keoghan character Scavenger
Erin Kellyman character Winifred
Ralph Ineson character Green Knight
Emilie Hetland character First Thief
Anthony Morris character Second Thief
Megan Tiernan character Princess / Gawain's Queen
Noelle Brown character Sharecropper's Wife
Youssef Quinn character Soldier #3
Aaron Edo character Soldier #2
Tyrone Kearns character Noble
Helena Browne character Blindfolded Woman
Brendan Conroy character Taverngoer
Ethan Dillion character Soldier #1
Chris McHallem character Lord in Waiting
Atheena Frizzell character Younger Sister
Donncha Crowley character Bishop
Patrick Duffy character Gawain's Friend (uncredited)
Janet Grene character Townsfolk (uncredited)
Simone Haines character Townsfolk (uncredited)
Tyrone Kearns character Noble (uncredited)
Tom Leavey character Knight of the Round Table (uncredited)