Dos tontos todavía más tontos: Reparto
Jim Carrey
Lloyd Christmas
Jeff Daniels
Harry Dunne
Laurie Holden
Adele
Rachel Melvin
Penny
Kathleen Turner
Fraida
Rob Riggle
Travis / Captain Lippincott
Tembi Locke
Dr. Walcott
Paul Blackthorne
Emergency Room Doctor
Brady Bluhm
Billy
Patricia French
Ms. Sourpuss
Steve Tom
Dr. Pinchelow
Don Lake
Dr. Meldman
Eddie Shin
Gordy
Atkins Estimond
Gus
Tommy Snider
Tom
Lindsay Ayliffe
Professor Garabedian
Matthew Cardarople
Inventor No. 1
Bill Murray
Ice Pick
Grant James
Mr. Stainer
Taylor St. Clair
Mrs. Steiner
Erin Allin O'Reilly
Asylum Nurse No. 1
Walt Arnett
KEN Audience Member
Erika Bierman
Fanny at Age 13
Kassidy Claire
Fanny at Age 5
Carly Craig
Young Fraida
Bryan Dilbeck
Dr. Dilbeck
Dalton E. Gray
Young Harry
Michael McCrudden
Audience Member
June Shannon
Harry's Trailer Park Wife
Maia Moss-Fife
Receptionist
Jeff Sumner
Convention Official
Julius Sharpe
KEN Conference Attendee
Dave Walpole
KEN Conference Attendee
Elizabeth Cooper
Mrs. Julie James
Michael Yama
Harry's Dad
Nancy Byers Farrelly
Asylum Nurse #2
Derek Holland
Asylum Patient
Brendan Boyle
Asylum Patient
Swizz Beatz
Ninja Leader
Mike Cerrone
Trucker
Sean Gildea
Trucker's Pal
Brett Wyman
Inventor #2
Jo Helton
Mrs. Snergle
Edward Barbanell
Nursing Home Orderly
Mariann Neary
Farmer's Wife
John Imlay
Farmer
Jon Barinholtz
Inventor No. 3
Lucas Daniels
Bartender
Carter Hicks
Bus Kid
Baxter Cooper Rogers
Prom Date
Sandra Dorsey
Stuffy Woman
Arielle Liberman
Emergency Room Nurse
Jon Barry
Emergency Room Orderly
Jesse Gines
Emergency Room Orderly
Robin O'Neal Sorensen
Emergency Medical Technician #1
Chris Randall Sorensen
Emergency Medical Technician #2
Daniel Greene
Wheelchair Ninja
Will Coogan
Room Service Waiter
Caryle Seim
Trailer Grandma
Danny Murphy
Joystick Victim
Paul Bednarz
KEN Convention Employee (uncredited)
Jennifer Cocker
Young Inventor (uncredited)
John Deifer
Mental Patient (uncredited)
Gregory Fears
Man at Gas Station (uncredited)
Abigail Gamache
Prom Attendee (uncredited)
William Goodrum
Prom Singer (uncredited)
Walter Hendrix III
Street Patron (uncredited)
Angela Kerecz
Waitress (uncredited)
John Merical
Neighbor (uncredited)
Rhomeyn Johnson
Bus Driver
Nancy Yee
Harry's Mom