Alfonso Obregon (Mexico D.F, July 29 1960) is a Mexican actor and director of dubbing. Their roles are usually very different, being this actor one of the most versatile. He was the voice of Brainy Smurf (since season 2), Handy Smurf, Tracker Smurf, Johan and King Gerard (some episodes) voice in the spanish version of the Smurfs cartoon show. His best known role as an actor give life to the ogre Shrek, in the movie of the same name, and in later sequels.