Witch's Night Out (1978)

A witch, disgruntled by the fact that no one takes Halloween seriously anymore, decides to stir things up and disrupt the social gathering in her old house as well as turn a couple of kids who love monsters into actual monsters.

Featuring Gilda Radner.  Witch's Night Out is a Canadian animated television Halloween special that premiered on NBC October 27, 1978. Produced in a Toronto studio, it was the sequel to the 1974 special The Gift of Winter with the vocal talents from Dan Aykroyd and Valri Bromfield.