Актьори

• Jack Nicholson — Francis "Frank" Costello
• Leonardo DiCaprio — William "Billy" Costigan, Jr.
• Matt Damon — Staff Sgt. Colin Sullivan
• Mark Wahlberg — Staff Sgt. Sean Dignam
• Vera Farmiga — Dr. Madolyn Madden
• Martin Sheen — Capt. Oliver Charles Queenan
• Ray Winstone — Arnold "Frenchy" French
• Alec Baldwin — Capt. George Ellerby
• Kevin Corrigan — Cousin Sean
• James Badge Dale — Barrigan
• David O'Hara — Fitzy
• Brian Haley — Detective #2 Tailing Queenan
• Mark Rolston — Delahunt
• Kristen Dalton — Gwen
• Audrie Neenan — Woman at Bar #2
• Dorothy Lyman — Woman at Bar #1
• Terry Serpico — Detective #3 Tailing Queenan
• Richard Hughes — Uncle Edward
• Robert Wahlberg — Lazio
• Anthony Anderson — Trooper Brown
• J.C. MacKenzie — Realtor
• Henry Yuk — Chinese Government Man
• Douglas Crosby — Man Killed by French
• Chance Kelly — Exam Instructor
• Jay Giannone — Detective #4 Tailing Queenan
• Kevin P. McCarthy — Detective #1 - Colin's Unit
• Nellie Sciutto — Queenan's Secretary
• Brian Smyj — Man Glassed in Bar
• Larry Mitchell — Younger Priest
• Tom Kemp — Billy Costigan, Sr. (credit only)
• Tracey Paleo — Darlene the Secretary
• Shay Duffin — Bartender at Brasserie
• Mick O'Rourke — Jimmy Bags
• Lyman Chen — Translator
• Joseph Riccobene — Kneecapped Bankrobber
• John Rue — Luncheonette Proprietor
• John Cenatiempo — Providence Gangster #2
• Jill Brown — Executed Woman
• David Conley — Gang Member with Mr. French
• Craig Castaldo — Crack House Denizen
• Conor Donovan — Young Colin
• Chris Fischer — Detective #2 - Colin's Unit
• Billy Smith — Detective #1 Tailing Queenan