Kabir Khan and Salman Khan’s first collaboration ‘Ek Tha Tiger’ has completed four years today. The film, also starring Katrina Kaif as the leading lady, was a super success at the box office and is counted amongst Salman’s biggest blockbusters ever.Rumours about the film’s sequel have been doing the rounds for quite some time now. Reports have also suggested that the sequel will be titled ‘Tiger Zinda Hai’ and will be directed by ‘Sultan’ director Ali Abbas Zafar.We don’t know whether the news of its tentative title and director are true or not but we do know that a sequel is in the offing. Kabir Khan has confirmed the same on his Twitter handle as he thanked his fans for making ‘#4YearsOfBlockbusterETT’ a trend on the micro-blogging website. Here’s what Kabir tweeted:Well, the question is, who will be Salman’s leading lady in the film. Let’s wait and watch.