Benny Safdie, who co-directed Uncut Gems and Good Time and played Robert Pattinson's brother in the latter film, has been cast as a gay politician in Paul Thomas Anderson's new movie, which remains untitled for now. Set in the San Fernando Valley of the 1970s where Anderson grew up, the film follows a high school student who is also a successful child actor. It's unclear who is playing the lead, but Bradley Cooper has a key role, and judging from photos of him in character that have leaked from the set, he's playing a Jon …