The actor, married to Avantika Malik, will take on the role of a womanising drinker and drug taker in the comedy.
Delhi Belly, which is mostly scripted in 'Hinglish', revolves around the messy lives of three bachelors sharing a flat.
Speaking to Mid Day, a source said: "He swears, drinks, indulges in several addictions and to top it all, is caught two-timing his two girlfriends. His relation with these two girls is an important track in the film.
"In fact, [his wife] Avantika Malik would often joke about how Imran is having a great time doing every thing that he doesn't believe in real life for Delhi Belly."
The actor will also be shown in a first-of-its-kind graphic love-making scene in the film, sources claim.
