My new story

So I have one story in my mountain of stories that I am completely sure that I want to be my first book. I have decided that I am going to put up the first complete draft that I've written. I've named it "The Gift of a Friend."
It's about two popstars Lucas Henrie and Harper Elias. Lucas Henrie is hiding a huge secret something that is killing him on the inside, and really fuels his alcohol and drug addiction. Harper is a recovering Drug addict who tries hard to get Lucas to see the light. I'm really bad at trying to come up with a good summation of stories.
But the story is going to be in multiple points of view from characters in the story. There is Harper and Lucas. Then there's also Harper's best friends Josh, and Courtney, and Harper's father Jack, and Harper's cousin Annie.
So here is a casting list if this was a movie.

Lucas- Jesse Eisenberg
Harper (Since it's my fantasy I'd be cast as Harper) But for you guys I'll say... Emma Roberts
Josh- Sterling Knight
Jack- Robert Downey Jr.
Courtney- Demi Lovato
Annie- Taylor Swift

If you're interested I'll be posting in a second