He is a versatile actor but Ajay Devgn says the role in his forthcoming film "Toonpur Ka Superhero" was the toughest.

"It was very tough doing this film. When you are standing in a green room and you are talking to people who are not present there, it becomes very difficult to imagine how they must be reacting.

"Apart from that there was a lot of action in the film where I had to fight with people who are not around me. So you have to take care of the entire body language, " said the 41-year-old.

Live action animation movie "Toonpur Ka Superhero" is slated to hit the screens Dec 24. Directed by Kireet Khurana, it has been produced by Krishika Lulla and Kumar Mangat Pathak.