Megastar Amitabh Bachchan is all set to begin the promotions of his upcoming film 'Shamitabh' tomorrow from Gujarat.

Amitabh Bachchan

Bachchan, 72, who is the brand ambassador of the state, will embark on a multi-city tour for the film.

"Ahmedabad first on 14th... Then a host of other cities - Delhi, Kolkata, Chennai, Dubai, London and perhaps Pune. These are informed promotion acts by authorities that make them...

"They may all come out true or may just fade away with some drastic last minute changes... Beware... But I do sincerely hope they do not," Bachchan posted on his blog.

Also starring Dhanush and Kamal Haasan's younger daughter Akshara in key roles, the R Balki movie is set to release on February 6.

Bachchan, who worked on promoting the cause of girl education, shot Shoojit Sircar's 'Piku' in Gujarat.

"Worked on the promotion of educating the girl child... came across some distressing visuals and stories. Let's educate our girls. They become the soul of the home. They are the reason for the warmth that embraces us all," he later tweeted.