Also featuring Elle Fanning, Jude Law, Diego Luna and Liev Schreiber, the film was completed in 2017, but its U.S. release was canceled by Amazon following intense media and industry scrutiny of Allen for decades-old, sexual-abuse allegations lodged by his daughter Dylan Farrow.
He has repeatedly denied any wrongdoing and has not been convicted of any crime. He recently filed a breach of contract lawsuit against Amazon pertaining to the film's release and the cancellation of other projects he had set up at the company.
It is scheduled to open in Italian theaters on Oct. 3, The Hollywood Reporter said.
"The official trailer for A Rainy Day in New York," Allen wrote without further comment in a weekend Facebook post.
The message accompanied a 90-second preview that shows college students, played by Chalamet and Fanning, heading into Manhattan so the young woman can interview a famous director.
She ends up getting ensnared in film-set drama, while Chalamet lands a role in a movie and is conflicted about kissing an actress played by Gomez in a scene.