Actress Priyanka Chopra, who shares screen space with Naseeruddin Shah in her forthcoming film "7 Khoon Maaf", says working with the acclaimed actor was not an easy task.

"He is a tremendous actor. I did a workshop with him before starting the film, because I've not worked with him a lot.

When I did the workshop, it kind of eased me out with Naseer sir but it's very difficult to work with him because when he is doing a scene, he is so good that you just keep looking at him, and I used to forget that even I have to say a dialogue, " Priyanka said.

The film directed by Vishal Bhardwaj is slated for a Feb 18 release.