"You talkin' to me" is famously said by Travis Bickle in which film?

Travis Bickle is a fictional character and the anti-hero protagonist of the 1976 film Taxi Driver directed by Martin Scorsese. The character has often been referenced in popular culture due to his famous "You talkin' to me?" monologue. The scene was listed by IGN as the 4th best moment in film history when counting their top 100. Bickle sinisterly utters the line while he stands in front of the mirror, clad in a USMC jacket, threatening his unseen foes with the gun up his sleeve.

Source: Wikipedia