Drafting and planning - effects on film poster image

As previously stated I am adding an effect called brief encounter onto the image. However there is a lot of wide space around the image creating negative space. What I have decided to do is by using shapes on page plus X6 I have made black square as the background, I removed the excess parts of the image in a circular way and put inner blur on the picture. This created an black effect around the image which made it seem as if the darkness was closing I around Lucifer. This picture is shown below.