One film, too much tension - GUESS WHO

This big budget film has been in the making for the last two years. This film was supposed to release last year but the shooting is still on. It doesn't help that the lead pair recently broke up with each other and hence there is too much tension on the sets.We hear that they are also increasingly getting impatient with the director because he is constantly changing the script. Their interaction with the director is limited to just work.