While Hollywood may be known for its glitz and glamour, making movies in Tinsel Town isn't always as magical as its made out to be.
Behind the scenes of even some of the industry's most beloved movies lurk disturbing, unsettling or downright dark secrets and facts.
It seems like more and more stories come out each day regarding unethical or morally dubious approaches to filmmaking in the name of artistic pursuit, from directors using barbaric techniques to get better performances out of actors, to tragic onset accidents and unnerving mysteries.
Today it's easier than ever before to shine the spotlight on wrongdoings, exposing them to the masses, but in decades' past that wasn't the case whatsoever.
While some movie studios would have you believe the production of their films was as colourful and joyous as the movies themselves, in reality the work that went into some of these features beneath the surface was characterised by misery and dishonesty.
These are some of the most disturbing behind the scenes movie facts that have come to light - at least for now.
10. Debbie Reynolds Danced Until Her Feet Bled In Singing In The Rain
Debbie Reynolds had very little experience with dancing when she was cast in Singing in the Rain.
Her co-star Gene Kelly is said to have insulted her over her lack of skill so much that she was once found crying under a piano by Fred Astaire when he visited the studio.
She told him what had happened and Astaire offered to teach her.
Reynolds began to train rigourously. Her feet were reportedly bleeding by the time they finished filming the Good Morning dance number, a shoot that lasted from 8:00am to 11:00pm. Reynolds later said of the movie, "Singin' in the Rain and childbirth were the two hardest things I ever had to do in my life."
Kelly later admitted that he was unkind to her and said that he was surprised she was still willing to speak to him afterwards.