As its title indicates, La Mort du Cygne is set in the special world of the ballet. Young dance student Rose Souris idolizes her teacher-role-model Mademoiselle Beaupré, and will do anything to help Mademoiselle Beaupré further herself. Thus, when rival ballerina Nathalie Karine lands a much-coveted role, Rose arranges an accident causing Nathalie to break her leg. The girl comes to regret her rash behavior when it appears as though Nathalie will never dance again.

Yvette Chauviré
as Mademoiselle Beaupré

Mia Slavenska
as Nathalie Karine

Janine Charrat
as Rose Souris

France Ellys
as Madame Souris

Jean Périer
as Director

Mady Berry
as Célestine

Suzanne Guémard
as Inspector

Mauricette Cebron
as Dance mistress (Professor at the Opera)

Claire Gérard
as Madame Bijou

Jacqueline Quéffelec
as Coco Battut