Brian 'Kato' Kaelin is an American actor and media personality who gained significant fame as a witness during the 1995 O.J. Simpson murder trial. His testimony about Simpson's movements and demeanor on the night of the murders made him a household name and a fixture of the televised proceedings. Following the trial, Kaelin parlayed his notoriety into a career in television and radio, appearing in reality shows, films, and as a guest personality. He has remained a figure in popular culture, often cited as one of the first individuals to become famous simply for being involved in a major media event.