Top 10 Low Budget Movies that turned Blockbuster

10. The Conjuring, Budget: $20M : Box Office: $318M
Based on a true story, the film tells the horrifying tale of how world renowned paranormal investigators Ed and Lorraine Warren were called upon to help a family terrorized by a dark presence in a secluded farmhouse. Forced to confront a powerful demonic entity, the Warrens find themselves caught in the most terrifying case of their lives.

Image Source: http://spinoff.comicbookresources.com/2014/01/17/creepy-conjuring-doll-to-get-her-own-spinoff-called-annabelle/
9. My Big Fat Greek Wedding, Budget: $5M : Box Office: $368M
My Big Fat Greek Wedding is a 2002 Canadian-American romantic comedy film written by and starring Nia Vardalos and directed by Joel Zwick.

Image Source: http://1033wvyb.com/2014/05/27/nia-vardalos-playtone-reuniting-for-my-big-fat-greek-wedding-sequel/
8. The Full Monty, Budget: $3.5M : Box Office: $257M
The Full Monty is a 1997 British comedy-drama film directed by Peter Cattaneo, starring Robert Carlyle, Mark Addy, William Snape, Steve Huison, Tom Wilkinson, Paul Barber, and Hugo Speer. The screenplay was written by Simon Beaufoy.

Image Source: http://www.broadwayworld.com/minneapolis/article/Theater-Latte-Da-Presents-THE-FULL-MONTY-At-The-Ordway-Center-McKnight-Theatre-1015-20091015
7. Saw, Budget: $1.2M : Box Office: $103M
Saw is a horror film franchise distributed by Lions Gate Entertainment and produced by Twisted Pictures that consists of seven feature films and additional merchandise.

Image Source: http://schmoesknow.com/saw-8-coming-to-a-theatre-near-you-in-spring-of-2015/19655/
6. Rocky, Budget: $995K : Box Office: $225M
A slightly dimwitted amateur boxer from Philadelphia's tough neighborhood gets a surprise shot at fighting for the heavyweight championship, while at the same time he finds love in the arms of a shy, reclusive girl who works in the local pet store.

Image Source: http://yoursomoney.com/rocky-balboa-12346-all-training-scenes-hd/
5. American Graffiti, Budget: $777k : Box Office: $140M
American Graffiti is a 1973 coming of age film directed and co-written by George Lucas starring Richard Dreyfuss, Ron Howard, Paul Le Mat, Harrison Ford, Charles Martin Smith, Cindy Williams

Image Source: http://www.wallarc.com/wallpaper/view/354097
4. Napoleon Dynamite, Budget: $400K : Box Office: $46M
Napoleon Dynamite is a 2004 comedy film written by Jared and Jerusha Hess and directed by Jared. The film stars Jon Heder in the role of the title character, for which he was paid just $1,000.

Image Source: http://www.dogomovies.com/napoleon-dynamite/movie-review/10007
3. Mad Max, Budget: $200K : Box Office: $99.75M
A police officer realizes that his life is in danger when he is targeted for the murder of the leader of a motorcycle gang in futuristic Australia.

2. The Blair Witch Project, Budget: $60K : Box Office: $248M
The Blair Witch Project is a 1999 American horror film written, directed and edited by Daniel Myrick and Eduardo Sánchez. The film was produced by the Haxan Films production company.

Image Source: http://mshayleyr1989.wordpress.com/2011/10/20/halloween-month-the-blair-witch-project-1999/
1. Paranormal Activity, Budget: $15K : Box Office: $193M
Paranormal Activity is a 2007 American supernatural horror film written, photographed, edited, and directed by Oren Peli. The film centers on a young couple, Katie and Micah, who are haunted by a supernatural presence in their home.

Image Source: http://wanderingkaijyu.blogspot.in/2011/10/demon-gets-its-due-paranormal-activity.html