How to make a successful film poster

During todays lesson we had chance to create our own film poster. The film that i decided to base my poster on was The Hangover.
Before I created the poster I researched conventions of a film poster. I found that in most film posters it included images of the stars, star rating, directors, when the film is out in cinemas, the title and any tag lines. As this film is comedy i decided to use funny pictures from the film. The title is bold which is eye catching and would attract large audiences. I have also included the star rating as this gives the audience an idea of whether they would want to see the film or not. This is because if the star rating was below 3 it means that they wouldn't be so keen on watching this. Also some people like to see what stars are in films as they may have particular favourites.
The tag line for this film would be 'A night that will never be forgotton..' This gives an idea of what the film is about and what the audience should expect from it. I also researched many different fonts which are used in other comedy films and they are mainly black and bold. This is so it attracts large audiences and the people who enjoy comedy films will watch this.