Mark Wahlberg

Sgt. Tommy Saunders

John Goodman

Commisioner Ed Davis

J.K. Simmons

Sgt. Jeffrey Pugliese

Kevin Bacon

Richard DesLauriers

Michelle Monaghan

Carol Saunders

Alex Wolff

Dzhokhar Tsarnaev

Themo Melikidze

Tamerlan Tsarnaev

Michael Beach

Gov. Deval Patrick

Vincent Curatola

Mayor Thomas Menino

James Colby

Superintendent Billy Evans

Jake Picking

Sean Collier

Melissa Benoist

Katherine Russell

Jimmy O. Yang

Dun Meng

Chris O'Shea

Patrick Downes

Rachel Brosnahan

Jessica Kensky

Khandi Alexander

Veronica

Lana Condor

Li

Dustin Tucker

Steve Woolfenden

Lucas Thor Kelley

Leo Woolfenden

Martine Assaf

Connie Pugliese

Cara Leroy O'Connell

Kara

Pamela Amicy

Tiesha

Brandon Wahlberg

Officer Travis Dixon

Kelby Turner Akin

Officer Dic Donohue

Billy Smith

Charlie Collins

Paige MacLean

Lisa Murphy

Adam Trese

John Bradshaw

Hampton Fluker

James Williams

Jay Giannone

Jimmy

Cliff Moylan

Sergeant John MacLellan

Curtis J. Bellafiore

Officer Joey Reynolds

Elijah Guo

Dias Kadyrbayev

Jin Yang Brancalhao

Aza

Brent Saunders

Robel

Dean Neistat

Michael Butler

John Fiore

Michael Thomas

Kathy Harum

Carol's Mom

Erica McDermott

Jimmy's Girlfriend

Peter Berg

Guy Opening MIT Door

John Franchi

Park Pedestrian

Anthony "Ace" Thomas

Third Officer at Falcon

Anthony Molinari

Waterville Policeman (uncredited)

Dicky Eklund Jr.

Young Police Officer

Colleen Kelly

FBI Analyst #4 (uncredited)

Sean Avery

Watertown Officer Franklin Street

Linda Klein

Tamerlan's Surgeon

Alexandria Tait

College Girl Outside of Sean Collier's #1 (uncredited)