Pakistani actor Ali Zafar had to work out hard to get a beefed-up frame for Kill Dil . Normally there are actors who lose weight for parts. But Ali went into reverse gear as he had to put on seven to eight kg for the Shaad Ali-directorial. Explaining his decision to bulk up Ali said: I had actually lost a lot of weight for 'Chashme Baddoor' to look like a college student. For 'Kill Dil' I needed a more mature and more beefy look. (Read: Hrithik Roshan looks super-ripped in Bang Bang teaser!) Ali constantly pumped iron in the gym.