Andy Serkis is famously know for playing Gollum in the Lord of the Rings movies as well as Caesar in the Plant of the Apes franchise. He visited with Stephen Colbert last night on the Late Show where Colbert stressed to viewers that Serkis is more than just a great motion capture performer, but a great performer overall and wanted to point out how much of the performance is the actor himself and how the motion capture is just the visual look. He shows an amazing clip of Serkis doing a speech as Caesar and having him morph into the character through CG. This isn't in the upcoming War for the Planet of the Apes, but rather was created to show what motion capture can do.
The end the bit with Serkis reading some tweet by President Donald Trump in the voice of Smeagol / Gollum, which makes Colbert seem happier than a school child on the first day of summer break.
Serkis will be seen in the upcoming Black Panther film as the villain Ulysses Klaue / Klaw.