Thomas Schell
Linda Schell
Oskar Schell
Abby Black
Stan the Doorman
William Black
Oskar's Grandmother
The Renter
Minister
Homeless Man
Deli Waiter
Schoolboy
Walt the Locksmith
Locksmith Customer
Hazelle Black
Prayer Group Woman
Prayer Group Man
Piano Man
Old Mr. Black
Denise Black
A year after his father's death, Oskar, a troubled young boy, discovers a mysterious key he believes was left for him by his father and embarks on a scavenger hunt to find the matching lock.