Just when you'd think Heyman might be resting on his laurels following the success of 2013's Gravity ($716 million worldwide) and January's Paddington ($258 million worldwide), he has embarked on another daunting challenge: bringing J.K. Rowling's Fantastic Beasts & Where to Find Them to the screen. Few projects matter as much to Warner Bros. — whose Kevin Tsujihara tagged it as a top priority when he was promoted to chairman in 2013 — making Heyman, 53, one of the studio's most important producers, even though he operates from his base in London. He proved he could deliver when he optioned Harry Potter and the Philosopher's Stone (as it then was called) in galleys and ushered along an eight-movie franchise that earned $7.7 billion worldwide at the box office. The son of producers Norma Heyman (Dangerous Liaisons) and John Heyman (The Go-Between), the onetime gofer for David Lean now is reteaming with Potter co-star Emma Watson on The Queen of the Tearling; making an adaptation of the controversial Jesus Christ biography Zealot; and overseeing an adaptation of best-selling novel The Light Between Oceans, with Michael Fassbender as a lighthouse keeper who finds a baby in a shipwrecked lifeboat.