'3 Idiots', a comedy-drama, was directed by Hirani and produced by Chopra.
The film starring Aamir, Kareena Kapoor, R Madhavan, Sharman Joshi, Omi Vaidya and Boman Irani was loosely adapted from the novel 'Five Point Someone' written by Chetan Bhagat.
Reportedly, Aamir has signed Hirani's tentatively titled film 'PK', which is to be produced by Chopra.
"We have finished writing 'PK'," Hirani told reporters here last night.
Asked if the trio would team up again, Hirani said, "Yes, it would be a return." Earlier, Aamir on his birthday had said, "I would love to do Raju's (Hirani) film. But I want him to make the announcement.
The script is very good. Raju is a very good director and a very good human being. We have spoken about a film, but it is better if he announces it."
This year, Aamir will be seen in 'Talaash', a psychological thriller directed by Reema Kagti which also features Kareena Kapoor and Rani Mukerji.
It is slated for release either in November-end or early December.
Then he has Yash Raj Films 'Dhoom 3', which is schedule to release in 2013. The shooting of 'Dhoom 3' starts in May.