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)

Albert Bour

Fish Salesman (uncredited)

Gil Delamare

Policeman (uncredited)

Moustache

Oscar the Seal (uncredited)

Rognoni

Zoo Owner (uncredited)

Pierre Sergeol

Restaurant Owner (uncredited)

Made Siamé

Fish Seller (uncredited)