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)