So, you think you know a lot about movies? You can recite every line from Jaws, you know who composed the music for the Matrix Trilogy and you know which year every Back to the Future movie was released?
That's impressive, but what about those lesser known facts from behind the scenes? Some facts about movies that you might not know will undoubtedly take you by surprise - and that's what this video is all about.
Here are twenty shocking movies facts that you won't believe are true...
Captain America: Civil War
One day prior to filming a fight scene with Robert Downey, Jr. in Captain America: Civil War, Sebastian Stan sent the Iron Man star a text message saying"Looking forward to our scene tomorrow Robert!" Attached to the message was a video of Stan doing intense bicep curls in front of the decapitated head of an Iron Man suit.
The Wizard of Oz
One of the stars of the classic movie The Wizard of Oz was undoubtedly the little dog, Toto. However, it's still pretty shocking that Terry - the female Cairn Terrier who played Toto - was paid more per week than the midget actors who played the Munchkins. Terry received $125 per week, the Munchkin actors received a mere $50.
Star Wars is one of the most iconic movies in cinema history - and it gave the world one of the most iconic villains in movie history in Darth Vader. But would you believe that he only had twelve minutes of screen time in the original movie? That really is testament to the impact he had.
Monty Python and the Holy Grail
Monty Python and the Holy Grail is undeniably one of the greatest comedy movies of all time, and one of its most memorable scenes involved using coconuts to mimick the sound of horses trotting. This scene was actually filmed out of necessity, because the movie's production team couldn't afford to use real horses!
Although the Terminator character is now synonymous with Arnold Schwarzenegger, studio executives originally wanted retired footballer O.J. Simpson to take on the role as the titular cyborg. However, director James Cameron intervened because he thought Simpson was "too nice" to be taken seriously as the character. If only he knew...
Toy Story is arguably the greatest animated movie of all time - and it forms part of what is arguably the greatest movie trilogy of all time - but it almost didn't exist in the form that we know it. It was originally conceived as a half-hour Christmas special. Thank goodness Disney ultimately decided to make it a full movie!
The Dark Knight
In The Dark Knight, Michael Caine was supposed to have lines in the scene where the Joker crashes Bruce Wayne's fundraising party for Harvey Dent. But Caine was so shocked at seeing Heath Ledger in character for the first time that he forgot to speak.
When you consider how prominent female characters are in Disney movies, it may come as something of a surprise to learn that 2013's Frozen was the first animated Disney production to feature a female director. Jennifer Lee holds the honour of being the first woman to helm such a movie - and even she did it in a joint effort with the very male Chris Buck.
In Disney's hugely successful animated offering Zootopia, pop star Shakira was one of many huge stars to voice a character - in her case, a pop star named Gazelle. When Shakira saw early designs of the character, she thought it was too skinny and personally requested that it was "meatier" with bigger hips! How very refreshing!
Independence Day: Resurgence
The sequel to 1996's Independence Day will be released this summer and it will go ahead without the previous movie's leading man, Will Smith. However, the original plan was for Smith to reprise his role as Captain Steven Hiller. Unfortunately, the Fresh Prince of Bel-Air star demanded a staggering $50 million to return, resulting in his character being killed off instead.
Due to the dark and tormenting nature of the upcoming Suicide Squad movie - and, in particular, thanks to the disturbing behaviour of Jared Leto as The Joker on the movie's set - an on-set therapist was hired in order to keep the all-star cast grounded and sane.