You'll need a pendant back and a small piece of wood for this project. I used some wood that came as food packaging for mine.
Cut the piece of wood to size to fit the pendant.
Paint the wood with blackboard paint. Apply a few coats.
Cover the inside of the pendant with glue.
Stick the blackboard in place and attach the pendant to a necklace chain using a jump ring.
Use a bronze or gold pen to write Now Playing, Coming Soon or something cinema related.
Finish by attaching a little cinema related charm and you're all done!