Dr. Larry Banks

Barry Bernson

Matthew Williams

Bill Camp

Ed Thompson (Hospital Director)

Herb Caillouet

Steven Murphy

Colin Farrell

Kim Murphy

Raffey Cassidy

Mary Williams

Denise Dal Vera

Anna Murphy

Nicole Kidman

Martin Lang

Barry Keoghan

Martin's Mother

Alicia Silverstone

Bob Murphy

Sunny Suljic

Doctor

Ming Wang

Principal

Drew Logan

Dr. Larry Banks

Barry G. Bernson

Elderly Man

Michael Trester

Doctor at Conference and Event Dinner(uncredited)

Dylan Keith Adams

Patient

Charles Poole

Bunraku Puppeteer(uncredited)

Mike Ancas

Conference Guest

John W. Harden

Conference Guest

Michael Lee Bailey

Nurse

Anita Farmer Bergman

Diner Patron

Megan Chelf Fisher

Conference Guest

Lea Hutton Beasmore

Doctor

Josephine Elle

Conference Attendance/Nurse

Rachel McAdams

Medical Conference Attendee

Jerry Pope

Hospital Orderly

Nathaniel Sizemore

Open Heart Patient On Table

William Willet

Medical Conference Attendee

Denise Barone

Conference Guest

Michelle Poole