Bumblebee (stylized as BumbleBee and sometimes marketed as Transformers: Bumblebee) is a 2018 science fiction action film based on the Hasbro and Takara Tomy's Transformers toy line character of the same name. It is the sixth installment in the Transformers film series, serving as a spin-off and prequel to the 2007 film. The film is directed by Travis Knight and written by Christina Hodson. It stars Hailee Steinfeld, John Cena, Jorge Lendeborg Jr., John Ortiz, Jason Drucker, and Pamela Adlon, and features Dylan O'Brien (as the title character), Angela Bassett, Justin Theroux, and Peter Cullen in voice roles. It was Knight's first live-action film, as well as the first film in the Transformers series not to be directed by Michael Bay, who instead acted as a producer. Principal photography on the film began on July 31, 2017, in Los Angeles and San Francisco, California.

Set in 1987, the Autobot scout Bumblebee is sent to Earth to establish a base for his comrades. But when he arrives on the planet, he soon finds himself hunted by both Sector 7 and the Decepticons. With his memory and voice lost in battle, he is found by a teenage girl named Charlie Watson. The pair work together to try to discover who Bumblebee is and why he is on Earth. But ultimately, they'll find themselves with the fate of the planet in their hands.

The film premiered on December 3, 2018, at the Sony Center in Berlin, and was released in the United States on December 21, by Paramount Pictures. It received positive reviews from critics, which praised its action sequences, Steinfeld's performance, Knight's direction, visuals, and the 1980s setting. Despite the film being the lowest-grossing installment of the franchise at the time, it was a box office success, grossing $468 million worldwide against a production budget between $102–135 million. A sequel, Transformers: Rise of the Beasts, was released on June 9, 2023.