Who sang Plaisir to Olivia de Haviland and in what film?

The song "Plaisir d'Amour" was sung by Louis Jourdan to Olivia de Havilland in the 1950 film "My Heart Belongs to Dad".

It's a beautiful and romantic scene where Louis Jourdan, playing a French artist, serenades Olivia de Havilland with this classic aria.