Dumb and Dumberer: When Harry Met Lloyd

Derek Richardson

Harry Dunne

Eric Christian Olsen

Lloyd Christmas

Mimi Rogers

Mrs. Dunne

Michelle Krusiec

Ching Chong

Shia LaBeouf

Lewis

Dana Gould

Mr. Moffitt

Luis Guzmán

Ray

Julie Costello

Twin

Eugene Levy

Principal Collins

Julia Duffy

Jessica's Mom

Colin Ford

Lloyd (at age 5) (uncredited)

Elden Henson

Turk

Carl Mazzocone

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Jill Talley

Mom

Cheri Oteri

Ms. Heller

William Lee Scott

Carl

Brian Posehn

Store Clerk

Lin Shaye

Margie

Wayne Federman

Officer Dave

Bob Saget

Jessica's Dad

Rachel Nichols

Jessica

Timothy Stack

Doctor

Troy Miller

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Jeff Cesario

P.A. Announcer

Dawn Michelle King

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Holly Towne

Preppy Student

Teal Redmann

Terri

Lucas Gregory

8-year-old Harry

Josh Braaten

Toby

Vahe Manoukian

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Tally Barr

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Lawrence Jordan

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Nancy M. Pimental

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Kevin Centazzo

Boyfriend

Tess Brewer

Little Girl

Stacey Hill

Dog Driver

Nathan M. Wright

Nebbish Guy

Roger Eschbacher

Superintendent Zimmer

Shawnie Costello

Twin

Aaron Kaplan

10-year-old Kid