Russell Crowe 
 as John Nash

Jennifer Connelly 
 as Alicia Nash

Ed Harris 
 as William Parcher

Paul Bettany 
 as Charles Herman

Christopher Plummer 
 as Dr. Rosen

Adam Goldberg 
 as Richard Sol

Josh Lucas 
 as Martin Hansen

Anthony Rapp 
 as Bender

Jason Gray-Stanford 
 as Ainsley Neilson

Judd Hirsch 
 as Helinger

Austin Pendleton 
 as Thomas King

Vivien Cardone 
 as Marcee

Jillie Simon 
 as Bar Co-Ed

Victor Steinbach 
 as Professor Horner

Tanya Clarke 
 as Becky

Thomas F. Walsh 
 as Captain

Jesse Doran 
 as General

Kent Cassella 
 as Analyst

Patrick Blindauer 
 as MIT Student

John Blaylock 
 as Photographer

Roy Thinnes 
 as Governor

Anthony Easton 
 as Young Man

Cheryl Howard 
 as Harvard Administrator

Rance Howard 
 as White-Haired Patient

Jane Jenkins 
 as Code-Red Nurse

Darius Stone 
 as Adjunct

Josh Pais 
 as Princeton Professor

Alex Toma 
 as Toby

Valentina Cardinalli 
 as Joyce

Teagle F. Bougere 
 as Young Professor

David B. Allen 
 as John Nash Jr. (Teenager)

Michael Esper 
 as John Nash Jr. (Young Man)

Eva Burkley 
 as Girl at Bar

Amy Walz 
 as Blond in Bar

Tracey Toomey 
 as Brunette

Jennifer Weedon 
 as Brunette

Yvonne Thomas 
 as Brunette

Holly Pitrago 
 as Brunette

Isadore Rosenfeld 
 as Pen Ceremony Professor

Tommy Allen 
 as Pen Ceremony Professor

Dave Bayer 
 as Pen Ceremony Professor

Brian Keith Lewis 
 as Pen Ceremony Professor

Tom McNutt 
 as Pen Ceremony Professor

Will Dunham 
 as Pen Ceremony Professor

Glenn Roberts 
 as Pen Ceremony Professor

Ed Jupp Jr. 
 as Pen Ceremony Professor

Christopher Stockton 
 as Princeton Student

Gregory Dress 
 as Princeton Student

Carla Occhiogrosso 
 as Princeton Student

Matt Samson 
 as Princeton Student

Lyena Nomura 
 as Princeton Student

Kathleen Fellegara 
 as Insulin Treatment Nurse

Betsy Klompus 
 as Insulin Treatment Nurse

Stelio Savante 
 as Technician

Logan McCall 
 as Technician

Bob Broder 
 as Technician

Scott Fernstrom 
 as Trent Humphres (uncredited)

Ron Howard 
 as Man at Governor's Ball (uncredited)

Bryce Dallas Howard 
 as Harvard Student (uncredited)

Michael Arthur 
 as Army Captain (uncredited)

Brian Smyj 
 as Army Soldier (uncredited)

Michael C. Pierce 
 as Radio Operator (uncredited)

Alex Lorre 
 as Technician (uncredited)

John H. Tobin 
 as Shadow Figure (uncredited)

James Whalen 
 as Construction Chief (uncredited)

Nick Oddo 
 as Noisy Construction Worker (uncredited)

Ty Copeman 
 as Doctor (uncredited)

Jonah Falcon 
 as Mental Patient (uncredited)

Reggie Austin 
 as Pen Ceremony Professor (uncredited)

Robert Myers 
 as Professor (uncredited)

Dave Sweeney 
 as Campus Cop (uncredited)

Berly Ellis 
 as Princeton Tutor '78 (uncredited)

Michael Abbott Jr. 
 as Princeton Library Tutor (uncredited)

Liche Ariza 
 as Princeton Student (uncredited)

Peter Bonilla 
 as Princeton Student (uncredited)

Evan Hart 
 as Princeton Student (uncredited)

Jason Horton 
 as Princeton Student (uncredited)

Vivian Kalinov 
 as Princeton Student (uncredited)

Dory Manzour 
 as Princeton Student (uncredited)

Tiffany Marz 
 as Princeton Student (uncredited)

Ryan O'Connor 
 as Princeton Student (uncredited)

Mills Pierre 
 as Princeton Student (uncredited)

Deborah Rayne 
 as Princeton Student (uncredited)

Colby Ryan 
 as Princeton Student (uncredited)

Douglas Taurel 
 as Princeton Student (uncredited)

Jeffrey Christopher Todd 
 as Princeton Student (uncredited)

Ryan Tygh 
 as Princeton Math Grad (uncredited)

Erik Van Wyck 
 as Princeton Student (uncredited)

Cade Bittner 
 as Harvard Student (uncredited)

Fabrizio Fante 
 as Harvard Student (uncredited)

Seth Gabel 
 as Harvard Student (uncredited)

Monique Marissa Lukens 
 as Harvard Student (uncredited)

Phil Cirincione 
 as MIT Student (uncredited)

Scott Addison Clay 
 as MIT Student (uncredited)

Michael Fiore 
 as MIT Student (uncredited)

Reed Penney 
 as MIT Student (uncredited)

Fileena Bahris 
 as Student (uncredited)

Sean Bennett 
 as Student (uncredited)

Rich Bryant 
 as Student (uncredited)

Jersey Carell 
 as Student (uncredited)

Gregory Gordon 
 as Student (uncredited)

Jarred Treiber 
 as Student (uncredited)