Transformers: Age of Extinction is a 2014 American science fiction film based on Hasbro's Transformers toy line. It is the sequel to Transformers: Dark of the Moon (2011) and the fourth installment in the Transformers film series. Like its predecessor, the film is directed by Michael Bay and written by Ehren Kruger. It stars Mark Wahlberg and Stanley Tucci, with Kelsey Grammer, Nicola Peltz, Jack Reynor, Sophia Myles, Bingbing Li, Titus Welliver, and T.J. Miller in supporting roles. It does not feature the original human cast from the previous three films, instead introducing a new human cast and as well as new Transformers, including the Dinobots. In the film, inventor Cade Yeager teams up with Optimus Prime and the surviving Autobots to investigate a manhunt involving Transformers for their hostility.

The film was released in the United States on June 27, 2014, by Paramount Pictures. It received generally negative reviews from critics, criticizing its pacing, runtime, direction, plot, and dialogue, although the action sequences and visual effects were praised. The film was a box office success, grossing $1.104 billion worldwide against a $210 million production budget, making it the highest-grossing film of 2014, the only film in 2014 to gross over $1 billion, and the tenth-highest-grossing film of all time at the time of its release. It was followed by Transformers: The Last Knight in 2017.