The biggest prankster has struck again. And at the receiving end this time it was Katrina Kaif who unknowing gifted versatile Nana Patekar a box full of old underwear, a single chappal and a fake moustache.

It all happened on the sets of ‘Rajneeti' when Ajay Devgn took Arjun Rampal and Manoj Bajpayee into confidence and pulled a joke on his leading lady Katrina.

As a part of the joke the trio informed her that it was Nana's birthday and that they were throwing a party for him. They also told her that she had to dress modestly in Indian attire, as Nana was very particular about how women dressed.

Kat hurriedly dressed up in a salwar-kameez and walked up to Nana with a box given by Ajay. "When Nana opened the box he was shocked to find old underwear, a single chappal and a fake moustache as a gift. Katrina was horrified," reveals a source from the sets.

Apparantly Kat was embarrassed and turned red-faced. Everyone including Ajay, Arjun and Manoj started laughing hysterically. Nana finally told her it was a prank and that she should be more careful with Ajay from now on.