The 74-year-old star expressed his gratitude to his followers as he continues to be the most followed Indian actor on the microblogging site.
"There was a time when only one (person) had seen my tweet. Today it's 29 million. I'm grateful," wrote Bachchan.
The "Pink" actor is ahead of Shah Rukh Khan (27.6 million), Salman Khan (25.1 million), Aamir Khan (21.8 million), Deepika Padukone (20 million) and Priyanka Chopra (18.9 million).
Bachchan had joined Twitter in 2010.
He will next be seen in "Thugs of Hindostan" and "102 Not Out".