Heinz Rühmann

as Dr. Lancelot Dodd / Dr. Ivor Marmion

Maria Sebaldt

as Mrs. Parker

Robert Graf

as Toni

Anton Diffring

as Howard

Mario Adorf

as Buddy Herman

Ernst Fritz Fürbringer

as Sir Gerald Blythe

Erika von Thellmann

as Mrs. Davis

Horst Keitel

as Purdie

Harry Wüstenhagen

as Mr. Bland

Ah Yue Lou

as Al Miller

Rudolf Rhomberg

as Glenville