India, Jan. 16 -- Many people and factors contribute to a film's commercial success. Sometimes a movie becomes a blockbuster simply because a bankable actor's name is attached to it. At other times, it may rake in the numbers due to a strong script, standout performances, the score or a scene or sequence that goes viral on social media. However, none of the highest-grossing films of all time would be successful without their directors. After all, it's the director who pulls everything together and transforms a strong story into a memorable experience.

Directing, unlike acting, is very much a behind-the-scenes role. However, certain directors have built their reputations in the industry to such an extent that people may not know the actor...