Kato Kaelin is an American television personality and actor, best known for his role as a witness in the high-profile trial of O.J. Simpson in the mid-1990s. He gained fame for his laid-back demeanor and his connection to Simpson, having lived in a guest house on Simpson's property at the time of the murder of Nicole Brown Simpson. Following the trial, Kaelin appeared on various reality shows and talk shows, further establishing his presence in popular culture. He has also acted in several films and television series, often portraying himself or characters that reflect his public persona.