Joker
(2019, USA)
directed by Todd Phillips

SYNOPSIS:
The film, based on DC Comics characters, stars Joaquin Phoenix as the Joker. Joker provides a possible origin story for the character; set in 1981, it follows Arthur Fleck, a failed stand-up comedian in Gotham City who becomes the Joker after a series of unfortunate events
​(Wikipedia)

Further Viewing

This excellent podcast discusses the film in depth and interviews the director:

Films that inspired Joker
The film is heavily inspired by movies of the late New Hollywood era, especially those directed by Martin Scorsese.

Further Reading
Los Angeles Times: Is Joker a dangerous movie?
Salon: Joker is a mess and a dangerous one
IndieWire: "Joker is incendiary, confused, and potentially toxic"
​CNN: Joker - a parable for our times
​Vanity Fair: Joker in the Trump era
The Guardian: Why Joker's depiction of mental illness is dangerously misinformed
USA Today on the film's depiction of mental illness
New York Times: What Joker says about whiteness
​OkayPlayer: The role black people play in Joker
NY Times: What is the panic over Joker really about?