Elijah Wood and Robin Williams walked down the blue carpet together for the world premiere of "Happy Feet Two" in Hollywood this past Sunday.The penguins are taking the audiences for one cool trip to Antarctica, in 3D. 　　Elijah Wood and Robin Williams are reprising their roles once again as penguins on the silver screen, in the sequel of the award-winning film, "Happy Feet," which became the third highest grossing animated film in the U.S., after pulling in $385 million U.S. dollars worldwide. 　　Williams, who voices Ramon and Lovelace, says that it was definitely a challenge to keep it clean. However, that's when director George Miller comes in to make sure it stays as a kid-friendly flick. 　　Don't be surprise to hear the voices of Brad Pitt, Matt Damon, Pink, and Hugo Weaving in "Happy Feet Two", which is slated for release this Friday in the U.S., and November 25th in Taiwan.