A close analysis of the “Ten O’Clock” lecture in which Whistler declared an end to the public’s participation in art. Also reveals the role played by Oscar Wilde. On 20 February 1885, James McNeill Whistler delivered his celebrated “Ten O’Clock” in Piccadilly, opposite the Royal Academy. More than a lecture, it was a witty, provocative monologue attacking conventional taste and asserting art’s independence from public opinion. Fashionable London society attended, including Oscar Wilde, whose own speaking tours partly inspired Whistler to take the stage. The event was hailed as a triumph and repeated in Oxford, Cambridge and other venues. Whistler even considered an American tour, combining the talk with an exhibition to strengthen his reputation as a professional artist – distinguishing himself from Wilde’s perceived dilettantism – but instead focused on publishing the text, enlisting Symbolist poet Stéphane Mallarmé for its French translation. The Performance of Art reassesses this episode, examining why Whistler sought the podium, the cultural context of his polemic and Wilde’s role. Through close analysis, it argues that “Ten O’Clock” stands as a work of art in itself, illuminating Whistler’s aesthetic philosophy while anticipating the widening divide between fine art and popular culture.