Michael Francis Moore (born April 23, 1954) is an American documentary filmmaker and author. He is the director and producer of Fahrenheit 9/11 (2004), a critical look at the presidency of George W. Bush and the War on Terror, which is the highest-grossing documentary at the American box office of all time and winner of the Palme d'Or. His film Bowling for Columbine (2002), which examines the causes of the Columbine High School massacre, won the Academy Award for Documentary Feature.

Both Fahrenheit 9/11 and Sicko (2007), which examines health care in the United States, are among the top ten highest-grossing documentaries. In September 2008, he released his first free movie on the Internet, Slacker Uprising, which documented his personal quest to encourage more Americans to vote in presidential elections. He has also written and starred in the TV shows TV Nation, a satirical newsmagazine television series, and The Awful Truth, a satirical show.

Moore's written and cinematic works criticize topics such as globalization, large corporations, assault weapon ownership, U.S. Presidents Bill Clinton, George W. Bush, and Donald Trump, the Iraq War, the American health care system, and capitalism. In 2005, Time magazine named Moore one of the world's 100 most influential people.