Megastar Amitabh Bachchan has done his cameo shoot for southern star Nagarjuna's film.

The busy 71-year-old is working in several projects and Nagarjuna's film, the details of which haven't been disclosed, is one of his completed tasks.

`Dear Lord of the heavens, do give me the strength to absent myself from this forum tonight. I have worked too hard for the day and the night. Finished commitment after commitment - a dubbing for Teach Aids on the pointers for those that are unaware of these dreaded diseases."


`Thereafter, a quick cameo shoot for Nag (Nagarjuna), son of the legendary late Akkineni Nageswara Rao, and a dear friend, for the film he has made in Telugu along with his father, and thereafter to the TV serial shoot,` Amitabh posted on his official blogging site srbachchan.tumblr.com.