François-Marie Banier (born 27 June 1947) is a French novelist, playwright, artist, actor and photographer. He is particularly known for his photographs of celebrities and other public figures and for his friendships with members of high society. In a prominent legal case, in 2016 he was convicted of 'abuse of weakness' of the elderly billionaire Liliane Bettencourt.

Banier was born in Paris, France. He grew up in a middle-class family in the 16th arrondissement of Paris. He has claimed he had been "completely incomprehensible to [his] parents".

Despite his modest background, from an early age he was a precocious and hyperactive talent, who was able to develop friendships with some of Paris' wealthiest arts patrons and artists. At the age of 16, he met Salvador Dalí, who would send his car to bring Banier to his suite at the Hotel Meurice to discuss art. At the age of 19, he befriended the wealthy heiress and patron of the arts Marie-Laure de Noailles who was then 64.

Banier published his first novel, Les Résidences secondaires ou la Vie distraite (Second Homes or Distracted Life), at the age of 22. Around the same time, a well-known Parisian designer and antique dealer Madeleine Castaing collected some of his photographs.

Over the years, Banier befriended many well-known public figures and celebrities, including Yves Saint Laurent, Pierre Cardin, Françoise Sagan, Samuel Beckett, Vladimir Horowitz, Louis Aragon, François Mitterrand, Kate Moss, Mick Jagger and Princess Caroline of Monaco. He is a friend of Johnny Depp and his ex-wife Vanessa Paradis, whom he met at his home in the south of France. Banier is godfather to their daughter, Lily-Rose. As of 2008 he shared his house with actor Pascal Greggory and his nephew Martin d’Orgeval.

In 1987, Banier was commissioned to photograph Liliane Bettencourt and Federico Fellini for the French magazine Egoiste. Bettencourt was one of the principal shareholders of L'Oréal and one of the wealthiest persons in the world with an estimated fortune of US$40.1 billion. Over the ensuing years, Banier and Bettencourt became friends and she became his chief benefactor, bestowing gifts upon him estimated to be worth as much as €1.3 billion. These gifts included a life insurance policy worth €253 million in 2003, another life insurance policy worth €262 million in 2006, 11 works of art in 2001 valued at €20 million, including paintings by Picasso, Matisse, Mondrian, Delaunay and Léger and a photograph by surrealist Man Ray and cash. The life insurance policies were allegedly signed over to Banier after Bettencourt was recovering from two hospital stays in 2003 and 2006. ...

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