Which special reason excited Alia and Varun to sign 'Badrinath Ki Dulhania'?

What made Alia Bhatt and Varun Dhawan work in ‘Badrinath Ki Dulhania’? What’s so special about this film? Find out in this exclusive interview of Alia and Varun only on ‘Sitaaron Ki Baat Sitaaron Ke Saath’….