A post on RPGWatch confirms information found in the IMDB credits for Risen outlining some of the writing and acting talent involved in creating Risen, Piranha Bytes' upcoming RPG. Voice talent in the game includes John Rhys-Davies, Andy Serkis, and Lena Headey; while the writing credits include Rhianna Pratchett, James Leach, and Andrew S. Walsh (thanks Acleacius). This subsequent announcement fleshes this out a bit more. Here's an excerpt:

One of the busiest actors in the UK, Andy Serkis takes the role of The Inquisitor. Serkis, who has had a long and varied acting career, is best known for his CG character representations Gollum in the Lord of the Rings trilogy and King Kong in the movie of the same name. Veteran British actor, John Rhys Davies, who has starred in countless blockbuster movies such as Indiana Jones and the Lord of the Rings trilogy, performs as Don Esteban. Movie actress Lena Headey, who played Sarah Connor in Terminator TV spin-off Terminator: The Sarah Connor Chronicles take the role of Patty. “The quality of the voice casting reflects the quality of the game” stated Paul Nicholls, Sales and Marketing Director, Koch Media UK “with such an amazing lineup of talent from movies and TV, there is a voice everyone will recognize; we will attract a new generation of RPG players to the genre”.