Dirch Passer

as Mathisen, ejer af hotel "Skildpadden"

Ole Monty

as S.P.R.F. Rodian, kriminalforfatter

Asbjørn Andersen

as Stenbeck, Rodians forlægger

Marguerite Viby

as Else Jessen, landsretssagfører

Preben Mahrt

as Erik Jessen, landsretssagfører

Bodil Miller

as Anna-Lisa, Rodians niece

Oscar Ljung

as Kale Karlfeldt, Anna-Lisas forlovede

Johannes Marott

as Viggo Frederiksen