Jack O'Connell is an actor. As there are 2 Jack O'Connells, this one is IMDB ref. nm0640081
Brazzaville Teen-Ager
(Mr. Hartman)
Jungle 2 Jungle
(Homeless Person)
Diggers
(Mr. Wilson)
Everyday People
(John)
Joe Gould's Secret
(Chef)
The Deli
(Jimmy the Newsman)
Sour Grapes
(Homeless Man)
Knight and Day
(Wilmer)
Doubt
(Mr. McGuinn)
The Big Sick
(Waiting Room Person 5)
The Paper
(Press Operator)
Requiem for a Dream
(Corn Dog Stand Boss)
The Quitter
(Uncle Richard)
Angela
(Man at Bar)
God's Pocket
(Mole Ferrell)
Men in Black 3
(1969 MIB HQ Guard)
Bringing Out the Dead
(Drunk)
Family Business
(Police Lieutenant)
The Driller Killer
(Rooftop Victim (uncredited))
The Yards
(Sal Disipio)
Big Night
(Man on Truck)
Hustlers
(Sergeant)
Wormwood
(Wet Works #1)
Inside Llewyn Davis
(Elevator Attendant)
The Boys in the Band
(Doorman)
The Impostors
(Stage Manager)
The Goodbye Girl
(Liquor Store salesman)
Law & Order: Trial by Jury
(John Whitney)
Marvel's Daredevil
(Silvio)
Blue Bloods
(Stanich)
Law & Order: Special Victims Unit
(George Kendall)
The Sopranos
(Vendor)
Horace and Pete
(Dennis)
Mad Men
(Bartender)
Flight of the Conchords
Law & Order
(Joseph)
Law & Order: Criminal Intent
(Dennis Murphy)
Conviction
(Court Officer Lou)
Fringe
(Male Resident)
Boardwalk Empire
(Celt)
What We Do in the Shadows
(Benjy Everett)
Dellaventura
(Foreman)
The Americans
(Bartender)
Bored to Death
(Sal Vitale)
Third Watch
(Graney)
Third Watch
(Louie)