Eddie Munster is a fictional character on the CBS sitcom The Munsters. He was portrayed by Butch Patrick in all episodes of the original series except for the pilot, where he was portrayed by Happy Derman. The only child of Herman and Lily Munster, Eddie is a werewolf. The role was later played by Jason Marsden in The Munsters Today.
Eddie is a typical all-American boy apart from being a werewolf and, in some episodes, showing some signs of being part vampire. Most noticeable is the fact that he sleeps in a coffin, which is never shown but whose creaking lid is heard occasionally. He is once depicted asking to sleep in a chest of drawers in the episode "Far Out Munsters" when the house is rented by the rock group The Standells, and the family is put up in a hotel. He has a stuffed toy werewolf named Woof-Woof, which bears an uncanny resemblance to Lon Chaney Jr.'s portrayal of Lawrence Talbot in the 1941 feature film, The Wolf Man. He attends elementary school, and aside from his pointed ears, severe widow's peak, green skin, and Fauntleroy suit, he is a normal-looking kid.
Eddie is very proud of his father, to the point of bragging about Herman's abilities and deeds to his friends. In fact, Eddie volunteering Herman for a heroic deed (which is clearly beyond Herman's capabilities, but one Herman nonetheless undertakes for Eddie's sake) is a central theme in many episodes.