Arbaaz Khan, the Bollywood actor, is all excited now and feels that good things are happening in his life now. The sibling of Bollywood's Bhai Salmaan Khan is known to the director Siddique when the latter directed Salman Khan's Bodyguard. Arbaaz will soon make hisMollywood debut with a biggie. Arbaaz will play a police officer in Siddique's upcoming entertainer Big Brother. Mohanlal stars as the lead man and Arbaaz is way too thrilled to be acting alongside the superstar of the industry. He calls it a once-in-a-lifetime opportunity. The pooja ceremony of the film was held a month back and the shoot of it had begun a couple of days back. Arbaaz will join the sets to shoot his portions later this month.