It’s not hard to deduce what classic films Phillips and long-time cinematographer Lawrence Sher borrowed for inspiration: The urban alienation of Taxi Driver and The King Of Comedy are clear thematic and visual touchstones.
If any deference is paid, it’s to Martin Scorsese, whose Taxi Driver inspires the gritty look of Gotham City circa 1981 (deep bows to the brute-force camerawork of Lawrence Sher) and whose lead character in that film, Travis Bickle (Robert De Niro), lives in the same bloody torment as our clown-face antihero.
Joker does indeed borrow elements from Martin Scorsese pictures (specifically, The King of Comedy and Taxi Driver, sometimes paying homage to the cinematography of both alongside sharing a similar setting) including a prominent collaborator in Robert De Niro, except it never feels like thievery considering a major component of the narrative sees Arthur Fleck investigating his own upbringing.
Though thematic and aesthetic parallels can be drawn to producer Martin Scorsese’s Taxi Driver and The King of Comedy, Joker is also inspired by the films of Sydney Lumet and Stanley Kubrick as well as the works of Ken Kesey and even Kurt Vonnegut.
He’s going for a gritty Martin Scorsese vibe — The King of Comedy specifically (most of the plot is borrowed from it), with a splash of Taxi Driver .
Todd Phillips’ direction is slick and effective, with numerous visual references and homages to the early works of Scorcese, in particular Taxi Driver (1976) and The King of Comedy (1982), the latter of which is further reinforced by the casting of Robert De Niro as talk show host Murray Franklin.