Susan Carpenter
Henry Carpenter (as Jaeden Lieberher)
Peter Carpenter
Sheila
Glenn Sickleman
Dr. David Daniels
Christina
Principal Wilder
John
Mrs. Evans
Tommy (as Max Simkins)
Morris
Nurse Leah
Big Ed
Gary
Gus
Dot
Teenage Girl Customer
Trucker
Bookstore Clerk
Nurse Kathy
Talent Show Singer
George Sickleman (as Philip Smreck)
EMT
Cop
Kid with 'R'
Parent (uncredited)
School Kid (uncredited)
Letter Kid (uncredited)
NY State EMT (uncredited)
Boy (uncredited)
Classmate (uncredited)
Girlfriend (uncredited)
Sibling (uncredited)
Talent Show Parent (uncredited)
Classroom Child (uncredited)
Stage Manager (uncredited)