The brand later expanded into London, with clients including David Bowie and Rod Stewart, and in 1969, Alexandre went international with a boutique in Paris that sold handbags, jewellery, wigs, and hair ‘falls’, an early form of hair extension
In the early 1980s, he opened Studio 17, a film and photography studio at North Audley Street, London, and the first client was Grace Coddington, then editor of Vogue UK.
It hosted shoots for Vogue UK, Vogue Italy, Condé Nast, and even casting for several James Bond films.
Regular visitors included Princess Diana, Prince Philip, Grace Jones, Tina Turner, Spandau Ballet, and Frankie Goes to Hollywood.
In the later 1980s and 1990s, he then branched out into television in the US and Canada, became an image consultant for 20th Century Fox.
His family in Switzerland said they “received countless messages from around the world” from those expressing condolences.
“Again and again, we hear the same truth: Pierre had a rare golden touch. He genuinely wanted others to succeed, and nothing made him happier than seeing people grow because of his guidance.”