Movie fans always enjoy watching how their favorite films were created: how a filming crew shoots marvelous battles, creates fantastic creatures and decorations, and so one. These tricks are usually kept in private but these backstage photos reveal some secrets.

Bright Side gathered rare shots from the film sets of movies that we all know very well. Some of these pictures show that the process can be both difficult and hilarious.

21. King Kong, 2005

20. Blade Runner, 1982

19. Jurassic Park, 1993

18. Ghostbusters, 1984

17. RoboCop, 1987

16. The Martian, 2015

15. AVP: Alien vs. Predator, 2004

14. The Terminator, 1984

13. Guardians of the Galaxy, 2014

12. Aliens, 1986

11. Dracula, 1992

10. Hellraiser, 1987

9. Star Wars. Episode IV: A New Hope, 1977

8. Predator, 1987

7. Dunkirk, 2017

6. The Lord of the Rings: The Return of the King, 2003

5. Hellboy II: The Golden Army, 2008

4. Justice League, 2017

3. Resident Evil: Extinction, 2007

2. Gone with the Wind, 1939

1. Titanic, 1997

Bonus: and here’s Leo cheering Kate up while she’s sitting in a hot pool after filming the final scene.

And which shots did you like the most?

Preview photo credit tumblr.com