23 behind the scenes photos from blockbuster movies

When watching a movie, we often don't think about what goes on behind the scenes or when the camera stops rolling. Movie sets are a world unto themselves. The tricks of the trade are often closely guarded secrets and we can only guess as to how crews manage to get a required effect.

What's more, things don't always run smoothly during a shoot, particularly if the cast don't get on well with each other, meaning if a shoot goes well everyone can breathe a sigh of relief and enjoy their jobs. So, in honor of everyone who finds themselves on a set, here's a fascinating selection of behind the scenes photos taken during the filming of some classic blockbusters.

1. Marilyn Monroe and Tony Curtis in Some Like It Hot. This movie was supposed to be in color, but was eventually released in black and white as the actors' stage make-up looked too artificial.

© Some Like It Hot / MGM   © Capital Pictures / EAST NEWS 

2. Jack Lemmon in make-up

© Some Like It Hot / MGM   © LFI / Avalon.red/ REPORTER / East News  

3. Kirk Douglas on the set of Spartacus

© Spartacus / Universal Pictures   © Capital Pictures / East News  

4. Kim Hunter AKA Zira the chimpanzee from Planet of the Apes

© Planet of the Apes / Fox Movies   © Capital Pictures / East News  

5. Leonardo Di Caprio and Kate Winslet take a break while filming Titanic

© Titanic/ Paramount Pictures  

6. Alfred Hitchcock on the set of Frenzy

© Frenzy / Universal Pictures   © LFI / Avalon / REPORTER / East News  

7. Mark Hamill, Carrie Fisher and Harrison Ford strike a pose on the Star Wars set

© Star Wars: Episode V - The Empire Strikes Back / Lucasfilm / 20th Century Fox   © Capital Pictures / East News  

8. The cast of Solo: A Star Wars Story

© Solo: A Star Wars Story / Lucasfilm / Walt Disney   © Capital Pictures / East News  

9. Harold Ramis, Ernie Hudson, Bill Murray and Dan Aykroyd on the Ghostbusters' set

© Ghostbusters / Sony Pictures   © Capital Pictures / East News  

10. During the filming of Maleficent

© Maleficent / Walt Disney Pictures   © Everett Collection / East News  

11. Eddie Redmayne and Jude Law chat during a break from filming Fantastic Beasts: The Crimes of Grindelwald

© Fantastic Beasts: The Crimes of Grindelwald / Warner Bros.   © Capital Pictures / East News  

12. The creepy twins from The Shining prepare for a scene

© The Shining / Warner Bros.   © Capital Pictures / East News  

13. The super-scary doll from Annabelle: Creation

© Annabelle: Creation / Warner Bros.   © Justin Lubin / Capital Pictures / East News  

14. Silence of the Lambs director, Jonathan Demme, with his female lead, Jodie Foster

© The Silence of the Lambs / Orion Pictures   © Capital Pictures / East News  

15. Emma Stone and Ryan Gosling rehearse for a scene in La La Land

© La La Land / TIK Films   © Capital Pictures / East News  

16. Sandra Bullock filming Gravity

© Gravity / Warner Bros.   © Capital Pictures / East News  

17. The usual green screen has been replaced by a blue one in Guardians of the Galaxy Vol. 2.

© Guardians of the Galaxy Vol. 2 / Marvel / Walt Disney Studios   © Capital Pictures / East News  

18. Proof that superheroes do fly in Captain America: The Winter Soldier

© Captain America: The Winter Soldier / Marvel / Walt Disney   © Everett Collection / East News  

19. Getting an alien ready for a scene in Men in Black

© Men in Black / Sony Pictures   © Capital Pictures / East News  

20. Gal Gadot and a producer on the Justice League set

© Justice League / Warner Bros.   © Call Enos / Everett Collection / East News  

21. A cute still from A Dog's Purpose

© A Dog's Purpose / Universal Studios   © Capital Pictures / East News  

22. An awesome shot of Greta Garbo with a lion

© Mary Evans Picture Library / East News  

23. Nice to see the man behind the voice - here's Steve Carell immortalizing Gru

© Despicable Me / Illumination Entertainment   © Capital Pictures / East News