Ali Fazal had the unit of his upcoming film 'Happy Bhaag Jayegi' wonder who the special guest on the set of his film was.

The actor along with Diana Penty and Abhay Deol shot for the film in Chandigarh recently. A girl would regularly visit him and spend time with him in his vanity van.

Though the identity of the girl is not known, Ali prefers to be tightlipped about her.