Hilary Swank as Erin Gruwell

Patrick Dempsey as Scott Casey

Scott Glenn as Steve Gruwell

Imelda Staunton as Margaret Campbell

April Hernandez Castillo as Eva Benitez

Mario as Andre Bryant

Kristin Herrera as Gloria Munez

Jaclyn Ngan as Sindy

Sergio Montalvo as Alejandro Santiago

Jason Finn as Marcus

Deance Wyatt as Jamal Hill

Vanetta Smith as Brandy Ross

Gabriel Chavarria as Tito

Hunter Parrish as Ben

Antonio García as Miguel

Giovonnie Samuels as Victoria

John Benjamin Hickey as Brian Gelford

Robert Wisdom as Dr. Carl Cohn

Pat Carroll as Miep Gies

Will Morales as Paco

Armand Jones as Grant Rice

Ricardo Molina as Eva's Father

Angela Alvarado as Eva’s Mother

Liisa Cohen as Brandy's Mother

Tim Halligan as Principal Banning

Brian Bennett as Brandy's Father

Lisa Banes as Karin Polachek

Giselle Bonilla as Young Eva

Earl Williams as Young Marcus

Blake Hightower as Clive

Angela Sargeant as Marcus' Mother

Robin Skye as PTA Mom

Chil Kong as Store Owner

Juan Garcia as Defense Attorney

Larry Cahn as Prosecutor

Abel Soto as Gang Member

Dan Warner as Cop #1

Randy Hall as Cop #2

Carl Paoli as Cop #3

Dominic Daniel as Drug Dealer

Cody Chappel as Bookstore Clerk

DJ Motiv8 as DJ

Renee Firestone as Herself - Holocaust survivor

Eddie Ilam as Himself - Holocaust Survivor

Elisabeth Mann as Herself - Holocaust Survivor

Gloria Ungar as Herself - Holocaust Survivor

Sonny Mario Ayon as Eva's Hispanic Gang Member / Student (uncredited)

Joe Seo as Student