the role of Castor in Tron: Legacy. Description above from the Wikipedia article Michael Sheen, licensed under CC-BY-SA, full list of contributors on Wikipedia.

Michael Sheen is a widely celebrated Welsh ... roles in some huge Hollywood movies such as Twilight, Underworld, Tron: Legacy. Most recently he's returned to the stage for National Theatre Wales ...

Michael Christopher Sheen ... the role of Castor in Tron: Legacy. Sheen was born in Newport, Wales to Irene (née Thomas) and Meyrick Sheen, both of whom worked in personnel management.