Stig Järrel

as Caligula

Alf Kjellin

as Jan-Erik Widgren

Mai Zetterling

as Bertha Olsson

Olof Winnerstrand

as Headmaster

Gösta Cederlund

as Pippi

Hugo Björne

as Dr. Nilsson

Olav Riégo

as Mr. Widgren

Märta Arbin

as Mrs. Widgren

Jan Molander

as Pettersson

Gunnar Björnstrand

as Teacher

Birger Malmsten

as Kreutz, student

Stig Olin

as Sandman, student

Richard Lund

as Teacher (uncredited)

Carl-Olof Alm

Gunnar Almqvist

Ingmar Bergman

Rolf Bergström

Bengt Carenborg

Nils Dahlgren

Bengt Dalunde

Edvard Danielsson

Curt Edgard

Sten Gester

Palle Granditsky

Carl-Einar Gregmar

Gunnar Hedberg

Gustaf Hedström

Torsten Hillberg

Nils Hultgren

Allan Linder

Lennart Nyberg

Anders Nyström

Bengt Persson

Arne Ragneborn

Bertil Solberg

Greta Stave

Lillie Wästfeldt

John Zacharias

Tom Österholm