Britta is the foster daughter of Professor Rydberg. The last 13 years she has lived with him and his son Sven. She and Sven are closely not only at the siblings' way. They are engaged.

Karlheinz Böhm
as Klaus Richter

Walter Giller
as Rolf Sprüngli

Margit Saad
as Jacqueline

Doris Kirchner
as Susi Sprüngli

Alice Treff
as Frau Richter

Maj-Britt Nilsson
as

Ingemar Pallin
as

Alice Babs
as

Erik 'Bullen' Berglund
as

Marrit Ohlsson
as