These kids went from sweet to scary — thanks to a makeover by their demented dad.

Richy Fowler, an English dad-of-three, creates makeup masterpieces for his children every Halloween — upping the gross-out factor every time around.

With the help of lots of face paint and some other props, the 46-year-old dad this year transformed his daughter Keira Lily from a freckle-faced cutie to a terrifying alien using gray paint and fake nails for fangs.

And his son, Shaun, went from ruddy-cheeked lad to bloody skeleton.