Hilton began modeling as a child, appearing first at charity events. At 19, she signed with Donald Trump's modeling agency, T Management. Hilton has also worked with Ford Models in New York, Models 1 Agency in London, Nous Model Management in Los Angeles, and Premier Model Management in London. She has appeared in numerous advertising campaigns, including Iceberg Vodka, GUESS, Tommy Hilfiger, Christian Dior, and Marciano. In 2001, Hilton began to develop a reputation as a socialite, being identified as "New York's leading It Girl" whose fame was beginning to "extend beyond the New York tabloids". She has since appeared in several magazines, including the April 2004 issue of Maxim magazine .