What we sometimes forget as viewers is that, during filming, there is probably more going on behind the camera than in front. The huge production teams work endlessly to make each scene picture perfect in order to bring their films to life. Whilst this is going on, actors sometimes enjoy a nice sit down and a chit chat between themselves behind the scenes.
To show all of this in motion, we have mustered up a range of behind the scene shots from some movie classics.
1 'Transformers' (2007)
In the first installment of the 'Transformers' saga, Bumblebee (pictured above) was based on a 2006 Chevrolet Camaro. The original mode of Bumblebee was a Volkswagen Bug, however director Michael Bay changed it to a Camaro due to it's comparison to Herbie the Lovebug.
2 'Alien' (1979)
In this sci-fi classic, the production team went the extra distance to bring the Alien to life. Shellfish, oysters and sheep kidney were used to recreate the internal organs, and shredded condoms were used to create tendons of the beast's ferocious jaws.
3 'Inception' (2010)
In spite of the extensive special effects sequences in 'Inception', the majority of the special effects throughout the film, were created through practical methods. The film only has around 500 visual effect shots, as opposed to most other visual effects epics which can have more than 2000 VFX shots.
4 'Jaws' (1975)
The movie's 25-foot great white shark was played by three full-scale mechanical models which was often guided by hidden scuba divers. The crew nicknamed the shark "Bruce" after Spielberg's lawyer, Bruce Ramer.
5 'Back To The Future 3' (1990)
Director Robert Zemeckis preparing the model train that crashes into the bottom of a ravine. With a budget of around $40 million, on its opening weekend release in the U.S. the film grossed $23 million and racked up an impressive $243 million worldwide.
6 'Some Like It Hot' (1959)
The yacht and beach scenes in Some Like It Hot were set in southern Florida, but were actually filmed at the historic Hotel del Coronado, a beachfront hotel in San Diego, California.
7 'Planet of the Apes' (1968)
All the ape actors and extras were required to wear their masks even during breaks and in between shots because it took so much time to make them up. Because of this, meals were liquified and drunk through straws.
8 'The Godfather' (1972)
The film was set and shot in New York, at over 100 locations. Originally, the entire 'The Godfather' film was to be shot in the Hollywood in order to save production costs. However, production designers wanted to add two stories to every building in order to replicate the look of New York City. The studio relented and allowed for shooting in New York.
9 'Indiana Jones and the Last Crusade' (1989)
Harrison Ford and George Lucas with models of the Nazi biplanes from the scene where Indy and his dad escape the zeppelin in the Last Crusade.The production team tried to make the Nazi props to be as authentic as possible. Costume designers even went around Eastern Europe to track down as many Nazi uniforms as they could.
10 'Gone With The Wind' (1939)
Vivien Leigh relaxing whilst Clark Gable has a cigarette. Apparently, both Leigh and Gable smoked three packs of cigarettes each day during filming. This didn't affect their performances as Gone with the Wind was the first film to receive more than five Academy Awards, receiving eight regular and two special Oscars.
11 'Star Wars'
Chewbacca (Peter Mayhew) and R2-D2 (Kenny Baker) in their human form having a sit down off set. The main reason why Mayhew got the role as everyone's favourite Wookie was due to his towering figure: he is over 7 foot tall. R2-D2, in contrast, stands at 96cm.
12 'RoboCop' (1987)
The RoboCop suit was so hot and heavy that actor Peter Weller was losing 3 lbs a day from water loss. Eventually, an air conditioner was installed in the suit.
12 'Leon: The Professional' (1994)
This was Natalie Portman's motion picture debut. She was 11 when she was cast and beat 2000 other actresses to the role. There was controversy between her parents and the producers, and as a result a contract had to be written to prohibit parts that involved smoking and sexual scenes.
13 'The Lord of the Rings: The Return of the King' (2003)
Peter Jackson and Gandalf (Ian McKellen) discussing the script in the third and final film. McKellan probably pocketed the script after this picture was taken, as he had a knack for stealing souvenirs after filming. For example, his staff is proudly displayed at his local pub, and he even has the keys to Bag End hanging up in his study in London.
14 'Titanic' (1997)
Leonardo DiCaprio and Kate Winslet preparing for the ending scenes of 'Titanic'. The post-sinking scenes were shot in a 350,000 gallon tank where the frozen corpses were created by applying a powder on the actors that then crystallised when exposed to water.
15 'The Silence of the Lambs' (1991)
Anthony Hopkins assembling himself as Hannibal Lecter before filming. When Hopkins' agent told him that he was sending him a script called 'The Silence of the Lambs', Hopkins immediately thought it was a children's movie.
16 'Star Wars: Episode V-The Empire Strikes Back' (1980)
The infamous moving opening prologue for each of the 'Star Wars'film from behind the camera. Each prologue gives an explanation of the events leading up to the start of the film. While the text is crawling up the screen, John William's famous Star Wars theme is blasting out, creating an attention grabbing start to the film.