Keri Russell says Andy Serkis is 'unbelievable'

Los Angeles - Keri Russell thinks Andy Serkis is an "unbelievable" actor.

The Americans star, who takes on the role of Ellie in Dawn of the Planet of the Apes, claims her co-star - who provides the voice for ape leader Caesar in the film as well as that of Golum in The Hobbit and The Lord of the Rings movies - isn't given enough recognition in the film industry.

She told The Hollywood Reporter: "Andy is just so good. That was really the treat of doing this movie. I really hope people start paying attention to him. He's unbelievable."

Serkis' character leads a nation of genetically evolved apes as they are threatened by a band of human survivors of a devastating virus which was unleashed a decade earlier, and the film's screenwriters claim it was his talent that allowed Caesar to speak.

Rick Jaff and Amanda Silver explained: "The decision to have him speak and have words - it was really Andy, we credit him with figuring out Caesar's voice."

Dawn of the Planet of the Apes is scheduled for release in the UK on 17 July 2014.

Watch the trailer here: