'The Nun' 'Memba Her?!

Eerie actor Bonnie Aarons had the world saying their prayers after she took on the role as the demon, Valak -- who takes the form of a terrifying nun and exercises evil to attack paranormal pros -- in the 2016 freaky film, "The Conjuring 2" ... and the 2018 holy spinoff film "The Nun."

Bonnie shared the scary big screen with Patrick Wilson and Vera Farmiga as the on-screen version of the paranormal couple Ed and Lorraine Warren.

She can also be spotted in "The Princess Diaries" and "The Princess Diaries 2: Royal Engagement" as Baroness Joy Von Troken.