It has been over three decades since National Lampoon's 'Christmas Vacation' hit the big screen and became an evergreen Christmas classic. The movie National Lampoon 'Christmas Vacation' (1989) revolves around the Griswold family that hosts the Christmas from hell. The reason for the chaos and hilarity is that the family's extended family including, four grandparents, one great aunt, one great uncle (Eddie), his wife and their two kids, descend upon them to spend Christmas with the Griswolds.