Collage poster campaigns

The poster campaigns such as 'Valentine's Day' and 'Love Actually' use a collage technique in order to advertise their films. In the poster on the top-left, the title is much clear than on the poster in the top right, making the title equally as focused upon as the photos. The photos show each of the characters within the film, giving the audience an immediate insight into the film and what to expect from the actors featuring in it. However, the poster shows no release date, so this could mean either the film has already been released or the poster emerged long before the release date. 
In the poster on the top-right, the photos make up a collage effect where there is a photo of each different actor/actress who plays a main role within the film. The title is not fully clear as the potential audience really have to focus to separate the letter from the background image in some cases.
The poster in the bottom-left shows the actors featured in the film in a collage within the shape of a heart, emphasising the topic of love and Valentine's Day, directly linking to the film. The actors names are listed below the heart shape are coloured based on their gender: with blue font of the male actors, and the pink font used for the female characters.
In the poster for 'Love Actually', the same theme of a collage is used to show the main actors within the film with the red ribbon and use of snow emphasising the idea of a Christmas setting with the title clearly positioned at the bottom of the page, however, this does suggest it will be the last thing the potential audience look at.

Regarding ideas for my own collage-theme based poster, I would replace the idea of using photos of the actors and actresses with images of struggles and benefits of being a teenager, focusing upon the idea of weighing up the positive and negative aspects of growing up and being a teen.