Night at the Museum: Secret of the Tomb, also called Night at the Museum 3: Secret of the Tomb is a 2014 American fantasy comedy film directed by Shawn Levy and written by David Guion and Michael Handelman. It is the third (and final live-action) installment in the Night at the Museum film series, and a sequel to Night at the Museum: Battle of the Smithsonian (2009). The film stars Ben Stiller in the lead role, Robin Williams, Owen Wilson, Steve Coogan, Ricky Gervais, Dan Stevens, Rami Malek, Rebel Wilson, and Ben Kingsley. In the film, security guard Larry Daley must travel to London to return the Tablet of Ahkmenrah, an Egyptian artifact which causes the exhibits to come to life, before the magic disappears.

Principal photography of Secret of the Tomb took place from January to May 2014 in London, England and British Columbia, Canada. The film premiered on December 11, 2014, at New York City's Ziegfeld Theater and was released in the United States on December 19, 2014. Secret of the Tomb grossed over $363 million at the box office, becoming the lowest-grossing film in the series, and like its predecessors, received mixed reviews. The film is dedicated to Robin Williams and Mickey Rooney who both died before the film's release.