Andy Serkis is a man of a thousand faces. Though he’s earned accolades (and a Golden Globe nomination) for his traditional acting work, his most famous roles—including The Lord of the Rings’s Gollum—are the ones in which his mug has been hidden.

On July 14, Serkis will reprise his role as Caesar, the brilliant leader of the Ape Army in Matt Reeves’s War for the Planet of the Apes.

In the minute-long video below, go behind the scenes of Weta Digital’s performance-capture technology, as Serkis becomes Caesar.

War for the Planet of the Apes will be released by 20th Century Fox on July 14, 2017.