Paranormal Activity

An Independent Horror Film written and directed by Oren Peli.
It premiered at the Screamfest Film Festival in the US on October 14, 2007, and was shown at the Slamdance Film Festival on January 18, 2008. The film received a limited release in several US cities on October 9, 2009, and had a nationwide release on October 16, 2009.
The film has earned over $100 million at the US box office alone, on a reported budget of $15,000. Paranormal Activity turned out to be one of the most profitable movies ever made, based on how much was spent compared to it's return investment. However, these figures are somewhat difficult to verify independently and likely excludes marketing costs.
Katie Featherston as Katie, Micha Sloat as Micha,
Mark Fredrichs as the Psychic,Amber Armstrong as Amber,Ashley Palmer as Diane (girl on Internet).
Overall I thought the movie was a bit slow at first but the ending gets better.
92 minutes Rated R for Vulgar language. Produced by Steven Schnieder and Jason Blum.
A sequel is said to be released on October 22, 2010.

Want to know more? Here is the trailer below.