José Luis de Vilallonga y Cabeza de Vaca, 9th Marquess of Castellbell, GE (29 January 1920 – 30 August 2007) was a Spanish nobleman, author, socialite and film actor. His peculiar character, described as "a mixture of aristocratic arrogance, self-confidence and unconcern", brought him frequent enmities with other public figures. He was known to be a multifaceted, charming, elegant and playboy-like figure.

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