Min vän Oscar

Åke Söderblom

Hans Lövgren

Margareta Fahlén

Gabriella Strandberg

Olof Winnerstrand

Claes-Herman Sundelius

Barbro Larsson

Diana Sundelius

Douglas Håge

Oscar

Börje Mellvig

Stenström

Sven Lindberg

Lovén, Zoologist

Jeanne Fusier-Gir

Lövgren's Housemaid

Pierre Bertin

UNESCO Director-General

René Alié

Policeman (uncredited)

Odette Barencey

Woman (uncredited)

Gil Delamare

Policeman (uncredited)

Pierre Sergeol

Restaurant Owner (uncredited)

Made Siamé

Fish Seller (uncredited)

Albert Bour

Fish Salesman (uncredited)

Moustache

Oscar the Seal (uncredited)

Rognoni

Zoo Owner (uncredited)