Gemini Man is a 2019 American science fiction action thriller film directed by Ang Lee. It stars Will Smith in the main dual role, alongside Mary Elizabeth Winstead, Clive Owen and Benedict Wong. The film follows a retiring Force Recon Marine scout sniper who is targeted by a much younger clone of himself while on the run from a corrupt private military company.

Originally conceived in 1997 by screenwriter Darren Lemke, the film spent nearly twenty years in development hell. Several directors, including Tony Scott, Curtis Hanson, and Joe Carnahan, were attached at some point and numerous actors, including Harrison Ford, Mel Gibson and Sean Connery, were set to star. In 2016, Skydance Media purchased the rights to the screenplay (which had been through several rewrites) from Walt Disney Pictures and, in October 2017, Ang Lee signed on to direct for Skydance with Paramount Pictures handling distribution. Filming took place from February through May 2018 using a high frame rate of 120 frames per second.

Gemini Man was released on October 1, 2019, and was theatrically released in the United States by Paramount Pictures on October 11, 2019. The film received generally negative reviews from critics for its plot and screenwriting, although the performances and action sequences were praised. The de-aging of Smith and the high frame rate drew mixed responses. It was also a box-office bomb, grossing only $174 million against its $138 million budget, with Paramount losing an estimated $111 million. Nevertheless, the film was nominated for Best Science Fiction Film at the Saturn Awards.