Over three decades of his movie career, Bollywood superstar Shah Rukh Khan's boyish charm, twinkling eyes and dimpled smile have become synonymous with charming romantic heroes he's best known for playing. In a scene from his latest film Jawan, a bald-headed, menacing Khan is seen surrounded by terrified passengers as he holds a metro train hostage. Khan, a household name in India, is also one of the country's most popular stars with millions of fans domestically and abroad.