
Robert Clohessy (born June 10, 1958) is an American actor, known for playing Correctional Officer Sean Murphy on the HBO drama Oz. He was also a cast member in the final season of Hill Street Blues.
He has had recurring roles in the ABC daytime drama All My Children, Guiding Light, and appeared in the short lived Fox show New Amsterdam. He also played a semi-minor role in the film "Across the Universe", playing the part of Jude's long-lost father. He was also a series regular in short-lived shows such as Laurie Hill who at that time starred a then-unknown Ellen Degeneres.
He played the role of "Mike" in the Broadway Roundabout Theatre Company revival of Pal Joey, from November 2008 through February 2009. He is currently seen on HBO's new show Boardwalk Empire.

The Avengers
2012 · as Police Sergeant

The Wolf of Wall Street
2013 · as Nolan Drager (Jordan's Lawyer)

Good Time
2017 · as 7th Floor Elmhurst Police Officer

16 Blocks
2006 · as Cannova

It Ends with Us
2024 · as Sheriff

27 Dresses
2008 · as Dive Bartender

Teenage Mutant Ninja Turtles: Out of the Shadows
2016 · as Deputy Warden Hamlett

Tower Heist
2011 · as Parade Cop

Man on a Ledge
2012 · as Prison Guard

All Good Things
2010 · as Building Superintendent

The Interpreter
2005 · as FBI Agent King

The Place Beyond the Pines
2013 · as Chief Weirzbowski

A Most Violent Year
2014 · as Mr. Rose

Finding Christmas
2024 · as Moe The Book

Angels in the Outfield
1994 · as Frank Gates

Across the Universe
2007 · as Wesley "Wes" Huber (Jude's Father)

The Immigrant
2013 · as Immigration Official

The Plantation
2025