Megastar Amitabh Bachchan says that the Mumbai city gives him the energy and motivation to get out of bed everyday for work.

"At interviews they ask me repeatedly 'where do you get the energy to do all that you do'..i found the answer .. its Mumbai the city," he posted on micro-blogging site Twitter.

"Mumbai, the city that pushes you out of bed each morning and tells you to 'go ! get it !' .. no other place motivates you more ..," he added.

The 68-year-old star was also thrilled to see his twitter fan following touching the nine lakh mark. "THANK YOU , twitter extended family (TwFmXt) ..just got home to see that the followers number has crossed 900,000 .. amazing !! WOW !," he posted.