The Informant may refer to:

• The Informant (1997 film), a TV movie about Northern Ireland
• The Informant (2013 film), a 2013 French film
• The Informant (book), a 2000 book by Kurt Eichenwald
• The Informant!, a 2009 film based on the book

The Informant! is a 2009 American biographical-comedy-crime film directed by Steven Soderbergh. It depicts Mark Whitacre's involvement as a whistle blower in the lysine price-fixing conspiracy of the mid-1990s as described in the 2000 nonfiction book The Informant, by journalist Kurt Eichenwald. The script was written by Scott Z. Burns, and the film stars Matt Damon, Scott Bakula, Joel McHale and Melanie Lynskey. The film is narrated by Damon from the first person point of view of Mark Whitacre.