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Ron Leibman (October 11, 1937 – December 6, 2019) was an American actor. He won both the Tony Award for Best Actor in a Play and the Drama Desk Award for Outstanding Actor in a Play in 1993 for his performance as Roy Cohn in Angels in America. Leibman also won a Primetime Emmy Award in 1979 for his role as Martin 'Kaz' Kazinsky in his short-lived crime drama series Kaz. Leibman also acted in films such as Where's Poppa? (1970), The Hot Rock (1972), Norma Rae (1979), and Zorro, The Gay Blade (1982). Later in his career, he became widely known for providing the voice of Ron Cadillac in Archer (2013–2016) and for playing Dr. Leonard Green, Rachel's rich, short-tempered father, on the sitcom Friends (1996–2004). Description above from the Wikipedia article Ron Leibman, licensed under CC-BY-SA, full list of contributors on Wikipedia.

A Little Help
as Warren Dunning

Archer
as Ron Cadillac (voice)

Garden State
as Dr. Cohen

Auto Focus
as Lenny

Dummy
as Lou Schoichet

Personal Velocity
as Avram Herskowitz

Law & Order: Special Victims Unit
as Stan Villani

The Sopranos
as Dr. Lior Plepler

Holding the Baby
as Stan Peterson

Just the Ticket
as Barry the Book

Don King: Only in America
as Harry Shondor

Night Falls on Manhattan
as Morgenstern

The Practice
as Atty. Robert Colby

A Rugrats Chanukah
as Rabbi / Old Man (voice)

Central Park West
as Allen Rush

Friends
as Leonard Green

Duckman
as Geofredo (voice)

In the Wings: Angels in America On Broadway

Fish Police
as The Codfather (voice)

Pacific Station
as Al Burkhardt

Law & Order
as Paul Kopell

Terrorist on Trial: The United States vs. Salim Ajami
as Simon Resnick

Seven Hours to Judgment
as David Reardon
Aaron's Way
Class Act: A Teacher's Story
as Sam Greene

Christmas Eve
as Morris Huffner

Many Happy Returns
as Jerry Brenner

The Comedy Factory
as Joey Caruso

Door to Door
as Larry Price

Murder, She Wrote
as Roland Trent

Rhinestone
as Freddie Ugo

Romantic Comedy
as Leo Jessup

Phar Lap
as Dave Davis

Zorro, The Gay Blade
as Captain Esteban

Rivkin: Bounty Hunter
as Stan Rivkin

Linda in Wonderland
as Himself

Up the Academy
as Major Vaughn Liceman (uncredited)

Norma Rae
as Reuben

Kaz
as Martin 'Kaz' Kazinsky

A Question of Guilt
as Detective Louis Kazinsky

Won Ton Ton: The Dog Who Saved Hollywood
as Rudy Montague

The Art of Crime
as Roman Grey

The Super Cops
as David Greenberg

Your Three Minutes Are Up
as Mike

Police Story

Slaughterhouse-Five
as Paul Lazzaro

The Hot Rock
as Stanley Murch

Where’s Poppa?
as Sidney Hocheiser

The Dick Cavett Show
as Self - Guest

The Tonight Show Starring Johnny Carson
as Self

The DuPont Show of the Week
as Carmatti

Tony Awards
as Self - Presenter

Golden Globe Awards
as Self - Nominee