Megastar Amitabh Bachchan will be seen in a special appearance in Nawazuddin Siddiqui-starrer Ghoomketu.Amitabh posted a few photographs from the shoot on his official blog on Sunday and shared the news about his presence in the comedy directed by Pushpendra Mishra."Those images from the Blog are an entire day's work professionally. They belong to a cameo that I am doing for film titled Ghoomketu, being produced by Vikramaditya Motwane and his Company, which also includes Anurag Kashyap", he said.Read: Amitabh Bachchan micro-managing every detail of his TV show YudhHe also praised Motwane for his 2010 film Udaan."Vikram did that wonderful film Udaan and he and other like-minded makers involve themselves in films that are now beginning to find space and honour and visibility and acclaim among the more discerning audiences of the country and the world," he posted.He even mentioned the "different avatars in the shoot"."I play myself of course in the leathered look, in my make-up room and discussing my dialogues for the coming shot in a film that is being made - a film within a film - which then moves to my make up shot, where further discussion on the origins of the dialogue, that I happen to accidentally find on a wrapping is wondered with my secretary, coincidentally called Rosy... leading on to the actual shot of the film in a court room scene in the film in film, which ends in a conviction of the person in the dock," he shared.