Though Kevin has evidenced 23 personalities to his trusted psychiatrist, Dr. Fletcher, there remains one still submerged who is set to materialize and dominate all the others. Compelled to abduct three teenage girls led by the willful, observant Casey, Kevin reaches a war for survival among all of those contained within him — as well as everyone around him — as the walls between his compartments shatter apart.
James McAvoy
as Dennis / Patricia / Hedwig / The Beast / Kevin Wendell Crumb / Barry / Orwell / Jade
Anya Taylor-Joy
as Casey Cooke
Betty Buckley
as Dr. Karen Fletcher
Haley Lu Richardson
as Claire Benoit
Jessica Sula
as Marcia
Izzie Coffey
as Five-Year-Old Casey
Brad William Henke
as Uncle John
Sebastian Arcelus
as Casey's Father
Neal Huff
as Mr. Benoit
Ukee Washington
as News Anchor
Ann Wood
as Game Show Enthusiast
Robert Michael Kelly
as Joe
