Leslie William Nielsen OC (born February 11, 1926) is a Canadian-American Emmy Award-nominated comedian and actor. He is well known for his roles as Frank Drebin in The Naked Gun, Dr. Rumack in Airplane! and most recently President Harris in the Scary Movie series. Although Nielsen's acting career crossed a variety of genres in both television and movies, he has achieved his greatest film success in comedies, including Airplane! and The Naked Gun series of films. His portrayal of serious characters seemingly oblivious of (and complicit in) their absurd surroundings gave Nielsen a reputation as a comedian. A series of later comedies attempted to emulate the popularity of his prior roles.

This paralleled the serious roles of his early career. Leading roles in the science fiction classic Forbidden Planet and as the ship's captain in The Poseidon Adventure came long before Nielsen considered a turn to comedy. His deadpan delivery as a doctor in 1980's Airplane! marked a turning point in Nielsen's career, one that would make him, in the words of movie critic Roger Ebert, "the Olivier of spoofs."

Leslie Nielsen was raised in Tulita (formally Fort Norman), Northwest Territories. His father was a mountie and a strict disciplinarian. His mother was Welsh. Leslie studied at the Academy of Radio Arts in Toronto before moving on to New York's Neighborhood Playhouse. His acting career started at a much earlier age when he was forced to lie to his father in order to avoid severe punishment. Leslie has starred in over fifty movies and many more TV films. One of his two brothers became the deputy prime minister of Canada.