While Karan Johar is keen to cast Sonakshi Sinha in his next film where SRK plays an eligible professor, he wonders whether she is ready to do a film outside Salman's creative ring

After a blockbuster with Salman Khan, and two more projects on the anvil with him, Sonakshi Sinha has got Shah Rukh Khan interested.

Apparently, Karan Johar is keen on signing her for his next venture where SRK plays a young, eligible professor. Sonakshi might play the campus hottie, a la Rani Mukherjee in Kuch Kuch Hota Hai.

The question that some in the industry, especially SRK's camp, are asking is whether Sinha is open to offers outside Salman Khan's creative radius?

Says a source, "So far, she has signed three films, two of them (Kick and Dabangg 2) are with Salman. The third project, Joker, is also affiliated to him because the director, Shirish Kunder, is close to Salman, and is in fact also directing Kick.

While Karan and Shah Rukh are keen on signing Sonakshi, they are wondering if the Salman-Farah group is supervising Sonakshi's career. "

Sinha laughs off the suggestion, though. "Aisa kuch nahin hai. Salman has been very supportive and helpful. Neither he nor Farah or anyone else is advising me on my career. I've the best advice at home.

And If I've not signed films with actors my age, it's because they've been busy with other projects. Besides, Salman and Akshay Kumar are superstars. Their age is of no consequence to me or the audience. "

Joker is going to be shot in 3D, and shooting starts in January.