Pop art emerged in the mid-1950s in Britain and late 1950s in the United States as an art movement that employed aspects of mass culture, advertising, comic books, and mundane cultural objects. Key figures included Andy Warhol, who created mass-produced images of celebrities like Marilyn Monroe that explored celebrity culture and advertising, and Roy Lichtenstein and Eduardo Paolozzi, who were early pioneers in adopting the visual languages of advertising and pop culture in their fine art works.