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
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
Arthur Wahlberg
Uncle Archie
Anthony 'Ace' Thomas
Third Officer at Falcon
David Ortiz
David Ortiz
Jay Karales
Marathon Attendee (uncredited)
Anthony Molinari
Waterville Policeman (uncredited)
Katrine Hoyt
Surgical Nurse #2 (uncredited)
Dicky Eklund Jr.
Young Police Officer
Kevin Molis
Watertown Police Officer
Colleen Kelly
FBI Analyst #4 (uncredited)