Paranormal Activity 2, the sequel to 2009’s docu-horror Paranormal Activity, arrives in theaters in the U.S. and Canada at midnight on Thursday, October 21, 2010. If you plan on seeing the sequel, now’s your chance to own the original film for FREE.

Starting today, if you pre-order your tickets for Paranormal Activity 2, you will receive a code to download Paranormal Activity from the iTunes Store for free. The promotion is a limited-time-only deal and will expire on October 29, 2010.

To get in on this promotion, visit www.ParanormalMovie.com to get your advanced tickets for Paranormal Activity 2. To receive the offer, you must go through the “Paranormal Movie” site, which then has options to buy your ticket from Fandango or Movie Tickets. Once you’ve purchased your advanced ticket for Paranormal Activity 2, you will receive an email within 24 hours with the free iTunes download code for Paranormal Activity.

Paranormal Activity 2 is produced by Jason Blum and Oren Peli, with story by Michael R. Perry and screenplay by Michael R. Perry and Christopher Landon, and directed by Tod Williams.

You must redeem your code for the free iTunes download of Paranormal Activity by November 28, 2010.

[Source: Paramount]