Directed by newcomer Shakun Batra, the film stars Imran Khan and Kareena Kapoor, and is expected to release in February 2012.
Karan was keen to have huge eyeballs for his trailer and felt that The Dirty Picture, being a keenly anticipated film, would make for the perfect platform.
While Karan confirmed the news on Twitter, Tanuj Garg, CEO - Balaji Motion Pictures remarked, "Dharma and Balaji are close. Karan is a great friend and we instantly accepted his request."