George Clooney as Bob Barnes

Matt Damon as Bryan Woodman

Jeffrey Wright as Bennett Holiday

Chris Cooper as Jimmy Pope

Amanda Peet as Julie Woodman

William Hurt as Stan

Christopher Plummer as Dean Whiting

Alexander Siddig as Prince Nasir Al-Subaai

Kayvan Novak as Arash

Amr Waked as Mohammed Sheik Agiza

Robert Foxworth as Tommy Barton

Nicky Henson as Sydney Hewitt

Nicholas Art as Riley Woodman

Steven Hinkle as Max Woodman

Daisy Tormé as Rebecca

Peter Gerety as Leland "Lee" Janus

Richard Lintern as Bryan's Boss

Mazhar Munir as Wasim Khan

Jocelyn Quivrin as Vincent

Shahid Ahmed as Saleem Ahmed Khan

Bikram Singh Bhamra as Pakistani Translator

Roger Yuan as Chinese Engineer

Jamey Sheridan as Division Chief

Randall Boffman as Distinguished Gentleman #1

Max Minghella as Robby Barnes

Nadim Sawalha as Emir Hamed Al-Subaai

Akbar Kurtha as Prince Meshal Al-Subaai

Sonnell Dadral as Farooq

Tim Blake Nelson as Danny Dalton

Mark Strong as Mussawi

Badria Timimi as Nasir's Wife

Viola Davis as CIA Chairwoman

Ozzie Yue as Chinese Oil Executive

Donna Mitchell as Pat Janus

David Clennon as Donald

Susan Allenback as Paralegal #1

Katherine Hoskins Mackey as Paralegal

Linda E. Williams as Paralegal

Susan Duvall as Assistant at CIA

Bahar Soomekh as Yassi (uncredited)

Susan Halsey Singer as Mother (uncredited)

Elena Rosa as CIA Operations Specialist (uncredited)

Lauren Minite as Restaurant Girl (uncredited)

Anna George as Reza's Sister (uncredited)

Wendy Kush as Witness (uncredited)

Mike Monroe as Lawyer (uncredited)