Conversation so far:
Who was chosen to act in the film Chapter 27?
Chapter 27 stars Jared Leto as Chapman.
Who else was in the film Chapter 27?
Lindsay Lohan was in Chapter 27 as a John Lennon fan who befriends Mark David Chapman,
What other actors were chosen for the film Chapter 27?
Mark Lindsay Chapman portrayed Lennon, in the 2007 film Chapter 27, which had Mark David Chapman as the lead character.

Question: How did the actors prepare for their roles?
Self-contained rewrite: How did the actors prepare for their role sfor the film Chapter 27?