Dennis / Patricia / Hedwig / The Beast / Kevin Wendell Crumb / Barry / Orwell / Jade
Casey Cooke
Dr. Karen Fletcher
Claire Benoit
Marcia
Five-Year-Old Casey
Uncle John
Casey's Father
Mr. Benoit
News Anchor
Game Show Enthusiast
Joe
Jai, Hooters Lover
Kevin's Mother
Vince, Security Guard
Academic Moderator
Dr. Fletcher's Patient
Taxi Driver
Flower Kiosk Worker
Security Guy with Dog
Older Worker
Paramedic
Police Officer #1
Police Officer #2
Television Reporter
Diner Waitress
Game Show Contestant (voice)
Game Show Host (voice)
David Dunn (uncredited)
Hannah (uncredited)
Bar Patron (uncredited)
Geraldo (uncredited)
Dan at Next Table (uncredited)
Waiter (uncredited)
Claire's Party Guest (uncredited)
EMT (uncredited)
Pedestrian (uncredited)
Boy in Park (uncredited)
Homeland Security (uncredited)
Detective (uncredited)
Restaurant Patron (uncredited)