Veteran actress Zeenat Aman has joined the cast of the upcoming Arjun Kapoor starrer 'Panipat', which is based on the third battle of Panipat. "It's an absolute honour and a fan moment to be directing Zeenatji...What is most fascinating...is her humility despite all the stardom," director Ashutosh Gowariker said. Zeenat will play the role of Sakina Begum in the film.