Debuted in Saat Hindustani, Bachchan is often primarily known for his unique baritone voice and for his excellency in the field of acting. Referred to as the Shahenshah of Bollywood, he has appeared in over 200 Indian films in a career spanning more than five decades. He is regarded as one of the greatest and most influential actors in the history of Indian cinema as well as world cinema, to an extent that the French director François Truffaut called him a "one-man industry".