A bunch of Bollywood directors and actors have been approached to create films as part of an United Nations (UN) campaign that aims at highlighting a variety of social issues. And we hear Tigmanshu Dhulia has already come on board to make a film on illegal immigration in the country.

While the names of Ajay Devgn and Hrithik Roshan are being tossed around for the lead actor role, the former is more likely to star in the film since he endorses the UN project.

A source close to the project says, `The campaign called Humanicy (Human Side of Diplomacy) seeks to spread awareness through documentaries created by Indian filmmakers and actors. The UN authorities plan to take up issues such as poverty, violence and intolerance.`

Angelo Antonio Toriello, who has founded and launched this campaign in India, met the director recently. `Tigmanshu's film will explore how immigration is a cause of concern in not just India, but various other countries too. Although it is a serious topic, he is trying to ensure that the tone is light-hearted so that it can reach the masses,` adds the source.

The casting for the film is underway and Devgn will possibly feature in it. Another source says, `Talks are on with Ajay as well as Hrithik to play the lead.

The film is supposed to go on floors by mid 2016.`

Tigmanshu's spokesperson confirms the news.