Mark Felt: The Man Who Brought Down the White House is a 2017 American biographical political thriller film written and directed by Peter Landesman, and based on the 2006 autobiography of FBI agent Mark Felt, written with John O'Connor. The film depicts how Felt became the anonymous source nicknamed "Deep Throat" for reporters Bob Woodward and Carl Bernstein and helped them in their investigation of the Watergate scandal, which resulted in the resignation of President Richard Nixon.

The film stars Liam Neeson, Diane Lane, Tony Goldwyn, and Maika Monroe. It premiered at the Toronto International Film Festival on September 8, and was theatrically released on September 29, 2017, by Sony Pictures Classics. It is also the fourth film on the Watergate scandal, following All the President's Men (1976), The Final Days (1989), and Dick (1999).