In addition to playing Gollum, Andy Serkis will also serve as Second Unit Director for Peter Jackson's The Hobbit films, according to The Hollywood Reporter.
"I think I understand Peter's sensibility and we have a common history of understanding Middle Earth," Serkis told the magazine, "A lot of the crew from 'The Lord of the Rings' was returning to work on 'The Hobbit.' There is really a sense of Peter wanting people around him who totally understand the material and the work ethic."
He also gave a some tidbits about his character saying, "He is very much a Gollum that people will recognize" and that he will be seen in his "truest form."
The first part of The Hobbit is set to hit theaters in December 2012 and the second part in December 2013.