The Fault in Our Stars is set to become one of this year's biggest movies. Here one of the film's stars, Ansel Elgort, talks about playing out the tragic love story of two teenage cancer sufferers. Elgort reveals what is was like dealing with such a heavy subject matter and how he coped having his Divergent sister Shailene Woodley playing his young lover. The 20-year-old rising star reveals how he won the role, how playing his character was the hardest thing he has ever done and how his friendship with Shailene was crucial in getting him through shooting.
