Transformers: Age of Extinction is a 2014 American science fiction action 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 supporting roles done by Kelsey Grammer, Nicola Peltz, Jack Reynor, Sophia Myles, Bingbing Li, Titus Welliver, and T.J. Miller. It does not feature the original human cast from the previous three films, and instead introduces a new human cast and many new Transformers, including the Dinobots. A struggling inventor and single-father discovers a damaged truck, which turns out to be a Transformer in disguise.

It was released in the United States on June 27, 2014, by Paramount Pictures. The film received generally negative reviews from critics for its runtime and Bay's direction, but was a box office success, grossing over $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.