Mark Ruffalo
as Robert Bilott

Anne Hathaway
as Sarah Bilott

Tim Robbins
as Tom Terp

Bill Pullman
as Harry Dietzler

Bill Camp
as Wilbur Tennant

Victor Garber
as Phil Donnelly

Mare Winningham
as Darlene Kiger

William Jackson Harper
as James Ross

Louisa Krause
as Carla Pfeiffer

Kevin Crowley
as Larry Winter

Bruce Cromer
as Kim Burke

Denise Dal Vera
as Sandra Tennant

Richard Hagerman
as Joe Kiger

Abi Van Andel
as Kathleen Welch

John Newberg
as Dr. Gillespie

Barry Mulholland
as Charles Holliday

Jeffrey Grover
as Edward Wallace

Jim Azelvandre
as Jim Tennant

Graham Caldwell
as Teddy Bilott (3-5)

William 'Bucky' Bailey
as Bucky Bailey

Marcia Dangerfield
as Grammer

Brian Gallagher
as David

Michael Haney
as Managing Partner

Barry G. Bernson
as Retired Partner

Michael King
as Unpleasant Partner

Greg Violand
as Union Carbide Lawyer

Michael Joseph Thomas Ward
as DOW Lawyer

John Moll
as Exxon Lawyer

Clara Harris
as Receptionist

Bella Falcone
as Crystal Tennant (11-13)

Scarlett Hicks
as Amy Tennant

Amy Morse
as Tom's Secretary

Aidan Brogan
as Teddy Bilott (12-14)

Nathan Slaughter
as Teddy Bilott (7-10)

Beau Hartwig
as Tony Bilott (10-11)

Jacob Bukowski
as Tony Bilott (4)

Keating P. Sharp
as Charlie Bilott (11-12)

Mikel Furlow
as Silas Pfeiffer (5)

Amy Warner
as Sarah's Mother

Linnea Bond
as Clerk

David Myers Gregory
as Diner Owner

Shyra Thomas
as Waitress

Ian Short
as Doctor

Kyndra Jefferies
as OB

Courtney DeCosky
as All-American Mom

Ken Early
as Chair of the Hearing

Kelly Mengelkoch
as Dr. Mary-Sue Kimball

Annie Fitzpatrick
as Judge

Buz Davis
as Fire Captain

Ronald Jenkins
as Security Guard

Wynn Reichert
as Mediator

Mike Seely
as Dr. Brooks

Teri Clark
as Neurologist

Brian Robertson
as Minister

Chaney Morrow
as Young Farmer

Jon Osbeck
as Sarah's Brother

Clyde Tyrone Harper
as Judge #2

Lisa DeRoberts
as Young Mother

Sara Mackie
as Young Woman

Nathan Neorr
as Local Reporter

Barbara Ann Crumm
as Courtroom Deputy

Sheryl Annette Colley
as Courtroom Employee

Logan Laskarzewski
as Stenographer

Phil Fiorini
as Pastor

Manuel Venegas Zepeda
as Benihana Chef

Jennie Malone
as Guitar Player / Singer

Jason M. Griggs
as Allied Lawyer

George Zamary
as Awbury Lawyer

Kurt Roberson
as Mover

Todd Minobe
as Cow Puppeteer #1

Jim Laprelle
as Cow Puppeteer #2

Sydney Miles
as Laura Doggett

Catch Farley
as Scruffy Boy

Trent Rowland
as Tall Boy

Geoff Falk
as Worker #1

Glen Yrigoyen
as Worker #2

Elizabeth Marvel
as Dr. Karen Frank (voice)

Ming Wang
as Waitress (uncredited)

Caleb Dwayne Tucker
as Parkersburg Resident (uncredited)

Lea Hutton Beasmore
as EPA / Dinner Guest (uncredited)

Anita Farmer Bergman
as EPA Agent (uncredited)

Lyman Chen
as Hack Scientist (uncredited)

Tyler Craig
as (uncredited)

David Fultz
as Blood Test Patient (uncredited)

Robert Gerding
as Lawyer (uncredited)

John W. Harden
as Waiter (uncredited)

Al Harland
as Parkersburg Citizen (uncredited)

Dennis Craig Hensley
as DuPont Lawyer (uncredited)

Daniel R. Hill
as DuPont Security Guard (uncredited)

Marc Hockl
as Church Goer (uncredited)

Sue Hopkins
as Rob Bilott's Mother (uncredited)

Matt Hudson
as Police Officer (uncredited)

Conner P. Kelley
as Smoker (uncredited)

Angel Kerns
as Parkersburg Resident (uncredited)

Bret Aaron Knower
as EPA (uncredited)

Rodger Masten
as Hand Double (uncredited)

David Pittinger
as Taft Lawyer (uncredited)

Joanne Popolin
as EPA Lawyer / Taft Lawyer (uncredited)

Ramona Schwalbach
as Plantiff's Family (uncredited)

Carly Tamborski
as EPA Hearing Attendee / Church Parishioner (uncredited)

Derek Polen
as Taft Lawyer (uncredited)

John E. Brownlee
as Taft Lawyer (uncredited)