This book is called Final Cut, by David Belbin. I would like to recommend this book.
This book is about a seventeen year-old girl called Sarah Wood who is a model. She is offered a starring role in a film. Her brother Jon asks her to find him a job for him with her, so Sarah finds him a message job which you have to send messages to the director Leo Fitzgerald. Sarah is Malissa in the play, a movie star called Luke Kelly is Aidan and Brett is Matthew.
Something bad goes wrong, a camera technician called Karen dies when a camera tied to a tree falls on top of her head, not only that when Sarah and Brett are on a speed boat, it caught on fire and explodes and then when everyone is acting out a fire scene it all goes wrong, someone put petrol on the fire so it can burn faster, luckily they were all safe.
At the end Luke dies from falling of a cliff. Jon looked like Luke so Leo said he can play Luke's part. When finally the film was made, the whole world of Luke's fan couldn't wait to watch it. The film came out one month after they acted it out. Sadly at the end Brett got stabbed by a gangster.