Karan Johar-Pritish Nandy at war!

Guess who the new Twitter frenemies are? Film-makers Karan Johar and Pritish Nandy!

They lash out against each other on a social networking site after one criticises the other's film.

Both are quite active on Twitter -- Karan a lot less than Pritish, who is a veteran by now. Earlier, Pritish ran into a bit of trouble when he spoke against Kareena Kapoor's performance and appearance in Kambhaqt Ishq.

Reacting to Pritish's comments, Kareena had then told DNA that he seemed to have too much time on his hands. Now, it's the turn of her producer Karan to back that statement.

A few days ago, Pritish posted on Twitter a review of Kurbaan from a website. The review ripped apart Karan's latest release. Not one to take this lightly, Karan tweets right back making a dig at Pritish, in his usual polite manner -- "Surprised how much time Pritish Nandy has to uplink google reader updates...must take a lesson of time management from his busy schedule."

Interestingly, not long ago, Karan had tweeted about how he has decided to follow people he doesn't like. Karan even follows Ram Gopal Varma, with whom he has always shared a love-hate relationship. He had told DNA then, "I have never hated people, but yes, I do get annoyed by some of them. I sometimes don't agree to what they tweet, but now it doesn't irritate me, it amuses me. I laugh at them."

But looks like this time Karan is not amused!

(DNA)