Casey Affleck
Lee Chandler
Lucas Hedges
Patrick Chandler
Michelle Williams
Randi Chandler
Kyle Chandler
Joe Chandler
C.J. Wilson
George
Gretchen Mol
Elise Henderson
Matthew Broderick
Jeffrey Garner
Anna Baryshnikov
Sandy
Heather Burns
Jill
Ivy O'Brien
Young Patrick Chandler
Kara Hayward
Silvie McGann
Tom Kemp
Stan Chandler
Josh Hamilton
Wes (Joe's Lawyer)
Tate Donovan
Hockey Coach
Ruibo Qian
Dr. Bethany
Robert Sella
Dr. Muller
Susan Pourfar
Nurse Irene
Stephen McKinley Henderson
Mr. Emery
Chloe Dixon
Suzy Chandler
Ellie Teves
Karen Chandler
Mary Mallen
Sharon
Richard Donelly
Mr. Martinez (1st Tenant)
Virginia Loring Cooke
Mrs. Groom (2nd Tenant)
Quincy Tyler Bernstine
Marianne (3rd Tenant)
Missy Yager
Mrs. Olsen (4th Tenant)
Ben Hanson
Bartender
Lewis D. Wheeler
1st Businessman at Bar
Anthony Estrella
2nd Businessman at Bar
Paul Meredith
Paul (Assistant Principal)
Carolyn Pickman
Paul's Assistant
Christian Mallen
CJ
Oscar Wahlberg
Joel
Wendy Overly
Wes's Assistant
Jackson Damon
Otto
Shawn Fitzgibbon
Tom Doherty (Ping-Pong Player)
Glenn McKiel
Manchester Police Chief
Joe Stapleton
Fire Marshall
Brian Chamberlain
Investigating Detective
Kenneth Lonergan
Manchester Pedestrian
Jami Tennille
Janine
Liam McNeill
Josh (Randi's Husband)
Danae Nason
Rachel (Randi's Friend)
Allyn Burrows
Father Martin
Nellie Lonergan
1st Girl at School ("Godspell")
Brian A. White
Jerry (Guy in Boat Yard Office)
Erica McDermott
Sue (Angry Boss in Boat Yard Office)
Frank Garvin
Homeowner
William Bornkessel
George's Son (uncredited)
Kt Baldassaro
Bar Patron (uncredited)