Steve Martin
Tom Baker

Eugene Levy
Jimmy Murtaugh

Bonnie Hunt
Kate Baker

Tom Welling
Charlie Baker

Piper Perabo
Nora Baker-McNulty

Hilary Duff
Lorraine Baker

Carmen Electra
Sarina Murtaugh

Jaime King
Anne Murtaugh

Taylor Lautner
Eliot Murtaugh

Alyson Stoner
Sarah Baker

Jonathan Bennett
Bud McNulty

Jacob Smith
Jake Baker

Liliana Mumy
Jessica Baker

Morgan York
Kim Baker

Kevin G. Schmidt
Henry Baker

Forrest Landis
Mark Baker

Brent Kinsman
Nigel Baker

Shane Kinsman
Kyle Baker

Blake Woodruff
Mike Baker

Alexander Conti
Kenneth Murtaugh

Melanie Tonello
Becky Murtaugh

Robbie Amell
Daniel Murtaugh

Shawn Roberts
Calvin Murtaugh

Peter Keleghan
Mike Romanow

Damon Runyan
Tennis Pro

Matthew Knight
Theatre Kid

Lee MacDougall
Doobner Dad

Haylee Wanstall
Doobner Daughter

Ely Henry
Doobner Younger Son

Tre Smith
Security Guard

Adam Shankman
Clam Bake Chef

Shawn Levy
Hospital Intern

Ben Falcone
Theatre Patron

Kelly Keaton
Theatre Patron

Phillip Brock
Theatre Patron

Juliette Goglia
Theatre Patron

Sara Van Horn
Theatre Patron

Nancy Daly
Theatre Patron

Kathryn Joosten
Theatre Patron

Resmine Atis
Theatre Patron (uncredited)

Talia Russo
Lifeguard (uncredited)

Konstantin Shaburov
Waiter at the Party (uncredited)