The Proust Questionnaire is a set of questions designed to reveal an individual's personality and preferences. Named after the French writer Marcel Proust, who famously answered a similar set of questions in a 19th-century interview, it has become a popular tool for self-reflection and understanding oneself and others. Typically consisting of 35 questions, the questionnaire covers various topics, including values, desires, and personal experiences. It has been used by many celebrities and public figures, often featured in magazines and interviews, to provide insight into their thoughts and feelings.