George Clooney
Michael Clayton
Tom Wilkinson
Arthur Edens
Tilda Swinton
Karen Crowder
Michael O'Keefe
Barry Grissom
Austin Williams
Henry Clayton
David Lansbury
Timmy Clayton
David Zayas
Detective Dalberto
Christopher Mann
Lieutenant Elston
Heidi Armbruster
Anna's Sister
Danielle Skraastad
Bridget Klein (voice)
Cynthia Mace
Wendy (voice)
Jonathan Walker
Del (voice)
Michael Countryman
Evan (voice)
Douglas McGrath
Jeff Gaffney
Julia Gibson
Stephanie Clayton
Amy Hargreaves
Interviewer
Susan Pellegrino
Secretary
Kevin Hagan
Raymond Clayton
John Douglas Thompson
Jail Guard
Edward Furs
Milwaukee Captain
Remy Auberjonois
Fifth Year
Katherine Waterston
Third Year
Brian Poteat
Deposition Lawyer
John Gerard Franklin
Correction Officer
Andrew Hunter Sherman
U / North (voice)
Sarah Nichols
Barry's Assistant
Paul Juhn
Second Associate
Tom McCarthy
Waiter (voice)
Tony Gilroy
Taxi Driver (voice) (uncredited)
Patrick Askin
Auction Bidder (uncredited)
Angelo Bonsignore
Videographer (uncredited)
Kevin Cannon
Auction Worker (uncredited)
Clem Cheung
Landlord (uncredited)
Emelie Jeffries
Raymond Clayton's Nurse (uncredited)
Josh Mowery
Lawyer (uncredited)
Kimmy Suzuki
Copy Shop Clerk (uncredited)
Steven Weisz
Executive (uncredited)
