Art The Clown first appearance : All Hallows Eve (2013) Terrifier

Ending to the 2013 Halloween-oriented horror film, "All Hallows' Eve. After Sarah, a babysitter for youngsters Tia and Timmy finishes watching an unusual VHS tape, she discovers that Art the Clown has slowly made his way into her reality. At one point, she decides to go and check on the sleeping siblings. It's finally revealed that Art has murdered them both and Sarah is presumably later charged with their slayings under bizarre, false pretenses.