'I am big. It's the pictures that got small': A look at Sunset Boulevard through Marshall McLuhan's theory of hot and cool media and personalities.

This article examines Billy Wilder’s 1950 film *Sunset Boulevard* through the lens of Marshall McLuhan’s media ecology theory, specifically his concepts of hot and cool media and personalities as outlined in *Understanding Media: The Extensions of Man* (1964). It argues that the film’s main characters—Norma Desmond, a former silent film star embodying a cool personality, and Joe Gillis, a young screenwriter representing a hot personality—symbolize the clash between the cooler silent film era and the hotter, high-definition world of sound cinema. The analysis highlights how the film’s narrative and mise en scène reflect the broader cultural and technological transition in Hollywood, illustrating McLuhan’s idea that media shape human behavior and social dynamics. The article also addresses critiques of McLuhan’s binary distinctions and suggests that *Sunset Boulevard* offers a nuanced case study for applying media ecology theories to classic cinema.