Parents need to know that Joker is an intense, complex, powerful thriller starring Joaquin Phoenix as the famous Batman villain. It's far darker and more violent than other takes on the character. Expect extremely graphic killings and blood spatters/sprays, guns and shooting, and stabbing. Several characters bully and beat up the main character, punching and kicking him, and there are scenes of fighting, rioting, rage, and shouting, as well as a scene of smothering with a pillow. There's brief nudity as the pages of a journal are flipped through, plus images and movie titles on porno theaters. The main character is shown with his hand down the front of his underwear, suggesting masturbation, and there's kissing. Language isn't constant but includes uses of "f--k," "s--t," "a--hole," etc. The main character takes prescription pills, and characters smoke frequently. The Joker isn't presented as a role model, but the movie does condemn those who do nothing to help the downtrodden get on their feet, which positions him as a somewhat sympathetic character. It also suggests that mental illness is one of the contributing factors to his villainous acts and behavior, which is troubling. The story disparages hate, anger, and unkindness, but it doesn't exactly promote kindness, love, or generosity.