Donnie Darko
Gretchen Ross
Frank
Karen Pomeroy
Kitty Farmer
Elizabeth Darko
Mrs. Rose Darko
Eddie Darko
Prof. Kenneth Monnitoff
Dr. Lilian Thurman
Jim Cunningham
Samantha Darko
Dr. Fisher
Bob Garland
Roberta Sparrow / Grandma Death
Joanie James
Cherita Chen
Principal Cole
David
Anne Fisher
Seth Devlin
Ronald Fisher
Mystery Woman
Ricky Danforth
Lanky Kid
Man in Red Jogging Suit
Linda Connie
Shanda Riesman
Kim
Beth Farmer
Passanger
Friend
Leroy
Larry Riesman
Trudy Potter
Corey
Iraq Jack
Randy
Officer ODell
Jeremy
Agatha
Pastor John
Phil
Jeff
Mike
Baelyn
Co-Worker
Barfing Girl / Waitress (uncredited)