Hula-Hopp, Conny

Cornelia Froboess

as Cornelia "Conny" Haller

Rex Gildo

as Billy Newman

Rudolf Vogel

as John Newman

Susi Nicoletti

as Diana Haller

Harald Juhnke

as Dr. Berning

Ingrid Pan

as Steffi Gutlieb

Elfie Pertramer

as Erna Gutlieb

Angèle Durand

as Lola

Elke Arendt

as Lotte

Paul Bös

as Tommy