He must be a millionaire, but now filmmaker Karan Johar is also a 'twittillionaire'! He has crossed the million followers mark on micro-blogging site Twitter, and is overjoyed with the growing list.

"Hey!!! Am a twittillionaire!!! A million thanks for all the love," Johar tweeted.

The 39-year-old, who is busy working on his next directorial "Student Of The Year", tweets under the handle kjohar25.

In his recent updates, he has been writing about the joys of working with a fresh cast for the youth-centric movie. "Student Of The Year" marks the debut of three youngsters - Siddharth Malhotra, Alia Bhatt and Varun Dhawan.