To make a movie it's necessary a good story; attractive actors and pretty actresses and a producer with a lot of money.
First, the scriptwriters write dialogues for actors and when the script is ready it is given to the actors. If the actors agree, they sign a contract with the producer.
Sometimes, some actors don't want to make a scene because they don't like it.
After that, they begin to film the movie. The movie is filmed in different places of the world: for example, some scenes of Harry Potter were filmed in England and some other in Portugal.
Normally, it takes a long time to make a movie.
Finally, the movie is shown in the cinemas and it it is very good it will be awarded in the Oscars ceremony.