Conversation so far:
Who was a part of the casting for the movie Chapter 27?
Jared Leto as Mark David Chapman; Judah Friedlander as Paul  Goresh; Lindsay Lohan as Jude Hanson and Mark Lindsay Chapman as John Lennon.
During filming Chapter 27 what was some obstacles if any?
Schaefer said, I had to go into a place that was very sensitive to our story, with trucks, a crew, and a limited amount of time. It wasn't easy.“

Question: Who had to gain weight?
Self-contained rewrite: Who had to gain weight to portray Mark David Chapman?