We're discussing All Hallows Eve (2013), the theatrical film debut of Art the Clown who would go on to be the star of the Terrifier series. Yes Art was in short films from Damien Leone: The 9th Circle (2008) and Terrifier (2011) (both of which are included in this anthology), but this is the first time he was in a theatrical release.
SOURCES:
https://www.imdb.com/title/tt2900624/
https://www.rottentomatoes.com/m/all_hallows_eve
https://www.imdb.com/title/tt1209301
https://www.youtube.com/watch?v=ohlW9SbhLzc