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Unless he played an uncredited role, no. The link below lists the actors in The Client.
The cast of Hostage in the Jungle - 2010 includes: Ingrid Betancourt as herself Jack Fortune as Narrator Marc Gonsalves as himself Sue Scott Davison as Narrator
The cast of Lichtblick - 2007 includes: August Diehl as Perpetrator Tammo Winkler as Hostage
The cast of The Lord Is My Shotgun - 2006 includes: Georgia Keigherly as Hostage Taken Tashi Martel as Hostage Taker Amber Parkes as Unlucky Shopper Glenn Ruehland as Dt. Ash Campbell
The cast of Hostage - 2013 includes: Holt Boggs as Eugene Nick Mancuso as Father Dario Brandon Slagle as Damon Jena Waldron as Grace Emma Waldron as Liz Natalie Wilemon as Gail
The cast of Seal Skins - 1932 includes: Frank Austin Charles Gemora as Jocko the Boxing Gorilla Billy Gilbert as (uncredited) Charlie Hall as (uncredited) Buddy McDonald as Office Boy Zasu Pitts Clifford Thompson Thelma Todd Leo Willis
The cast of The Hostage - 2011 includes: Duante Gray as Hostage
The cast of Uncredited - 2011 includes: Stefan Sieweke as Stefan Till Trenkel as Till
The cast of The Hostage - 2013 includes: David Kuskie as Brother Cody Lyle Asher as Hostage
The cast of Hostage to the Devil - 2014 includes: Malachi Martin as himself
The cast of Hostage Person - 2005 includes: Paolo Gojcaj as Tony
The cast of The Hostage - 2010 includes: Chelah Horsdal as The Lover Aleks Paunovic as The Hostage Tahmoh Penikett as The Figure Juan Riedinger as The Brother
The cast of Wesley Willis - 2003 includes: Steve Albini as himself Wesley Willis as himself
The cast of Willis VIPs - 2005 includes: Willi Weitzel as Himself - Host
The cast of The Semi-Hostage Incident - 2014 includes: Adam Minarovich as Adam Robert Pralgo as Robert
The cast of The Sad Hostage Situation - 2011 includes: Mark Alderson as Brian Noah Martin as Jeff
Jason Schwartzman. Uncredited, as were all the actors who were Beatles.