Explaining about her and Alex's role in the film, Argon said: "John (Alex) is quite unusual and they (couple) have a very intense connection right from the start. It gets deeper throughout the story."
"Our relationship is very romantic. It's that young love that isn't tainted by any sort of fear... When you haven't had your heart broken 500 times."
The film, based on a book of the same name, is being presented by Dream Works Pictures and Reliance Big Entertainment. It is directed by D.J. Caruso and produced by Spielberg and Michael Bay.
Sources have revealed that Agron used to always hang out on the sets with Pettyfer before heading out for a difficult stunt scene to make sure that he was alright, even though she was not a part of those scenes.
The film is about nine teenaged aliens who have different powers and are sent to earth to hide from their enemies. These aliens can only be killed in numerical order and with the first three already dead, John Smith (Alex Pettyfer) learns that he is number four.