John Buijsman

as Dieter Adriaansens

as Dieter Adriaansens/Lennon

as Voice-over

as Opa Jan

as Richard

as Kees

as Richard van Kampen

as Nico

as Voice-over

as Captain SS Rotterdam

as Willem

as Vader Bas

as Vader Alex

as Nikkelen Nelly

as Meester Menno (voice)

as Arend Valk

as Principal

as Opa Darius

as Pa

as Henk van Langeveld

as Dr. Doolittle

as Joop

as Huub

as Mr. van Dol

as Inspector

as Arie Kooijman

as Rob

as Father Antoin

as Simon

as Karel Groen

as Don

as Dutch Soccer Coach

as Ernie T.

as Karel

as Dr. Doolittle

as Inspecteur

as Pooijer

as Dr. Doolittle

as Meneer Visser