Paul Giamatti
Paul Hunham
Dominic Sessa
Angus Tully
Da'Vine Joy Randolph
Mary Lamb
Carrie Preston
Miss Lydia Crane
Brady Hepner
Teddy Kountze
Ian Dolley
Alex Ollerman
Jim Kaplan
Ye-Joon Park
Michael Provost
Jason Smith
Andrew Garman
Dr. Hardy Woodrup
Naheem Garcia
Danny
Stephen Thorne
Thomas Tully
Gillian Vigman
Judy Clotfelter
Tate Donovan
Stanley Clotfelter
Darby Lee-Stack
Elise
Bill Mootos
Mr. Endicott
Dustin Tucker
Mr. Rosensweig
Juanita Pearl
Mary's Sister Peggy
Alexander Cook
Priest / Bartender
Liz Bishop
Office Lady
Cole Tristan Murphy
Toothbrushing Student
Will Sussbauer
Cobb Salad Student
Carter Shimp
Weed Buyer Harriman
Michael Malvesti
Christmas Tree Guy
Dakota Lustick
Christmas Tree Helper
Melissa McMeekin
Hooker
Jonathan von Mering
ER Doctor
Rena Maliszewski
ER Nurse
Osmani Rodriguez
Pharmacist
Oscar Wahlberg
Pinball Player
Dan Aid
Vietnam Vet Kenneth
Mike Kaz
Hip Party Guest
Kelly AuCoin
Hugh Cavanaugh
Colleen Clinton
Mrs. Cavanaugh
Fred Robbins
Santa Claus
David J. Curtis
Psychiatric Orderly
Pamela Jayne Morgan
Waitress
Davis Robinson
Maître d'hôtel
Joe Howell
Liquor Store Cashier
Peter Krasinski
Choir Leader
Greg Chopoorian
Jason Smith's Father
Ian Lyons
Miss Crane's Boyfriend
Kevin Fennessy
Irritated Movie Patron
Kevin Daigneault
Barton Parent (uncredited)
Bhanu Gopal
Boston Streeter / Pedestrian (uncredited)
Quinn Stone
Student (uncredited)
Lily Steven
Kristy (uncredited)