The Insider is a 1999 American biographical drama film directed by Michael Mann, from a screenplay adapted by Eric Roth and Mann based on Marie Brenner's 1996 Vanity Fair article "The Man Who Knew Too Much". The film stars Al Pacino, Russell Crowe, Christopher Plummer, Bruce McGill, Diane Venora, and Michael Gambon.

Michael Kenneth Mann is an American film director, screenwriter, author, and producer, best known for his stylized crime dramas. Mann has received numerous accolades including a BAFTA Award and two Primetime Emmy Awards as well as nominations for four Academy Awards and two Golden Globe Awards. His most acclaimed works include the films Thief (1981), Manhunter (1986), The Last of the Mohicans (1992), Heat (1995), The Insider (1999), Ali (2001), Collateral (2004), Public Enemies (2009), and Ferrari (2023). He is also known for his role as executive producer on the popular TV series Miami Vice (1984–90), which he adapted into a 2006 feature film.