Knock Knock 2 (2011) is a Horror, Thriller, Mystery film that follows on the night before Halloween, four friends decided to go on a self made tour of famous Hollywood murders and celebrity haunted houses. The tour led them to a house known as 1666. They have been missing ever since. Currently, you can watch Knock Knock 2 on Amazon Video, Apple TV Store, Google Play Movies, YouTube. Streaming availability may vary by country and platform over time. It has a user rating of 5.5 out of 10 from 21 votes. Fans of horror movies may also want to explore similar titles below.