The story starts in 1997 with the tragic death of his mum, Princess Diana, in a car crash.
The film producers say it'll be a coming-of-age flick about a normal boy growing up and having fights with his dad.
The script's already written, but they now need to find a British actor to play the young Prince.
So they are starting a Harry Potter-style search for a look-alike who can act too.
The filming will take place in England or Ireland this summer with the flick set to air in the US in October.