Alan Oppenheimer (born April 23, 1930) is an American character actor and voice actor. He has performed numerous roles on live-action television since the 1960s and has had an active career doing voice work in cartoons since the 1970s. He is best known as the voice of Falkor in 1984's The NeverEnding Story and Skeletor in Filmation's 1980s cartoon He-Man and the Masters of the Universe. His work in the Smurfs cartoon show includes the voices of Vanity Smurf, Father Time, and other miscellaneous characters such as the King of the Trokels.