Katrina Kaif is riding on high on back-to-back successes. The actress has not only delivered one hit after another but has gone on to become the most sought out actress in Bollywood.

But the actress will now face a real tough challenge, as director Nikhil Advani of ‘Kal Ho Na Ho’ fame wants to cast the actress opposite none other than Amitabh Bachchan.

The actress, who has played the love interest of all most all the top heroes of Bollywood, will play the love interest of Amitabh Bachchan in the movie.

Not just that, the actress would also play the role of a 60 year old for the first time, as the movie follows the life of the protagonist from 20 to 60.

Apparently, director Nikhil Advani is very adamant on having Katrina Kaif as the lead actress in the movie.

“Nikhil is adamant on having Katrina on board. He even flew to London just to be able to narrate the film to her. The final call will be taken when Kat returns to Mumbai,” said a source.

It would be interesting to see whether the actress is up for the challenge.