The "Chennai Express" star is currently busy cheering up for his IPL team Kolkata Knight Riders in the ongoing IPL series.
"And the love just keeps growing by leaps and bounds! Congrats @iamsrk! #SRK13Million", tweeted Red Chillies entertainment, Shah Rukh's production house.
SRK, who joined the micro-blogging site in 2010, has surpassed his industry colleagues Salman Khan and Aamir Khan and is second only to megastar Amitabh Bachchan as far as the numbers of Twitter followers of Bollywood celebrities are concerned.
Shah Rukh will also be seen in Rohit Shetty's "Dilwale" and Yash Raj production's "Fan".