He may be saying "Bbuddah-Hoga Terra Baap" in his next film, but Bollywood megastar Amitabh Bachchan is facing a tough time matching dance steps with the young dancers and choreographers on the sets of his home production.

"My knowledge of dance has been excruciatingly minimal. And now with the modern day choreographers and dancers that have developed a style of their own, it is tough going for me!" Amitabh posted on his blog.

The 68-year-old, known for his typical dancing style, has been rehearsing hard to pick up the steps.

"Matching the dance steps of the younger lot today is a nightmare for me ... desperately rehearsing in spare time to not look foolish!" he posted on Twitter.

"Really ... the artists fascinate me on this issue. I see others lazily flow into a song and come out looking like a million bucks!! They must be terribly well designed to pick up what the move expects from them, in a jiffy. When I in the meantime keep seeking rehearsals, and retakes," he added.

"Bbuddah-Hoga Terra Baap" is being helmed by southern director Puri Jagannath.