` `` Vegas Vacation celebrates its 25th anniversary this year . The movie was the 25th in the National Lampoon ` `` Vacation '' . Directed by Jeremiah Chechik in his feature film debut , `` Christmas Vacation '' reunited Chevy Chase and Beverly D'Angelo as Clark and Ellen Griswold , Chicago-area parents of two who never seem to get the `` vacation '' concept quite right . It was written by Beverly D'Angelo based on one of his short stories .
` `` Vegas Vacation celebrates its 25th anniversary this year . The movie was the 25th in the National Lampoon ` `` Vacation '' . It was written by Beverly D'Angelo based on one of his short stories .