MARGUERITE BBC4 i player

Paris in the 1920s. Wealthy Marguerite Dumont is an enthusiastic lover of opera. She often holds private concerts at home during which she sings for friends and acquaintances, but seems completely oblivious to the fact that she has been gifted with an astonishing lack of singing talent. Her fanciful delusions are aided by her entire social circle, in thrall to her money, as well as her servants and her husband - none of whom has ever uttered a single word of criticism. One day, however, she gets a chance to sing at public event.

In French with English subtitles.

https://www.bbc.co.uk/iplayer/episode/m0002w74/marguerite