The movie, which is an afterlife love story, is being helmed by Faraz Haider.
This is the first time Abhay and Patralekhaa are teaming up for a movie.
The 'Happy Bhag Jayegi' star also shared the poster on the micro-blogging website.
He wrote, "Started work on a new film! A dark comedy, my favourite genre. #Nanukijaanu."
The flick 'Nanu Ki Jaanu' is produced by Inbox Pictures and it is scheduled to release in the April next year.