Julia Roberts (Erin Brockovich), Albert Finney (Ed Masry), Aaron Eckhart (George), Scarlett Pomers (Shanna Jensen), Michael Harney (Pete Jensen), Marg Helgenberger (Donna Jensen), Peter Coyote (Kurt Potter), Veanne Cox (Theresa Dallavale), Cherry Jones (Pamela Duncan), Pat Skipper (Verteidiger), Wade Williams (Ted Daniels), Mimi Kennedy (Laura Ambrosino), Irene Olga Lopez (Mrs. Morales), Joe Chrest (Tom Robinson), Valente Rodriguez (Donald), Scott Sowers (Mike Ambrosino), Tracey Walter (Charles Embry), Conchata Ferrell (Brenda), David Brisbin (Dr. Jaffe), Sheila Shaw (Ruth Linwood), William Lucking (Bob Linwood), Jamie Harrold (Scott), T. J. Thyne (David Foil), Cordelia Richards (Rita Daniels), Kristina Malota (Annabelle Daniels), Adilah Barnes (Anna), Randy Lowell (Brian Frankel), Jack Gill (Verteidiger)