Rajkumar Hirani is an Indian film director, producer and screenwriter known for directing humorous films with social messages. Some of his most notable films include Munna Bhai MBBS (2003), Lage Raho Munnabhai (2006), 3 Idiots (2009), and PK (2014), all of which were major box office successes in India and abroad. His films are known for having unconventional protagonists, satirizing important issues through comedy, and blending poignant scenes with comic relief.