Kate Middleton as herself

The roommate 

"I honestly thought he would ask you out.  It's not weird though, right?"

Jasmine Sanders as Molly King

The supportive best friend

"Girl, she just stole your man."

Zoe Sugg as Zoe Fletcher and Alfie Deyes as Oliver Lancaster

The couple that always gives good advice

Oliver: "I don't know why I didn't think of this sooner."

Zoe: "I have a YouTube channel.  That's not weird, right?"

Gemma Chan as Jenny Liu

The truest friend from the beginning

"She was the first person who ever stood up for me.  We became instant best friends after that."

Diana, The (Late) Princess of Wales as herself

Prince William's mum 

"Not to worry, I'll protect her."

There will be talks of racism, the late Princess Diana's death because she will be a main character in the first part of the book, death/loss, drama, bullying and love.  

* The first chapter will be updated after Christmas.