Ranbir Kapoor: Bollywood’s chocolate boy is a big prankster in real life. The prey of his pranks this one time were Yeh Jawani Hai Deewani costars Kalki Koechlin and Aditya Roy Kapur where the duo was shooting a scene where they were supposed to take shots from glasses. Naughty Ranbir switched the water in the glasses with real vodka to get them drunk!

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