She performed operetta often alongside Chevalier and was in the ensemble for the Paris debut of Belle of New York.

The pair is featured in the photograph "Réunion de stars du cinéma" by Erich Salomon.

One by one applicants detached themselves from a waiting group in the wings and danced or sang so that Chevalier and his producers could make their choice.

As the sharp tinkle of the piano died away one of the producers announced, "Madamoiselle is engaged," and shortly afterwards the girl whose name was Yvonne Vallee heard that she was to have a dance in the revue as partner to Chevalier himself."

Vallée frequently performed alongside her husband, playing the café proprietor's daughter (the love interest of her husband's character) in Le Petit Cafe, in the musical "Playboy of Paris", directed by Ludwig Berger and singing in duo with him on the recording "Dit's moi M'sieur Chevalier".