Transformers: The Last Knight is a 2017 science fiction film based on Hasbro's Transformers toy line. It is the sequel to Transformers: Age of Extinction (2014) and the fifth installment in the Transformers film series. The film is directed by Michael Bay from a screenplay by Art Marcum, Matt Holloway, and Ken Nolan. It stars Mark Wahlberg reprising his role from Age of Extinction, while Josh Duhamel reprises his role from the first three films, and Stanley Tucci and Anthony Hopkins join the cast. In the film, inventor Cade Yeager is gifted a Talisman by a dying Transformer knight, and is soon recruited by an eccentric British professor to save the world from the impending threat of Unicron.

It premiered on June 18, 2017, at the Odeon Luxe Leicester Square in London and was released in the United States on June 21, by Paramount Pictures. The film received negative reviews from critics, grossing $605.4 million worldwide against a production budget between $217–260 million and losing Paramount an estimated $100 million on the theatrical release with marketing and distribution costs factored in. A prequel, titled Bumblebee, was released in December 2018.