The official trailer of Salman Khan and Katrina Kaif starrer 'Tiger Zinda Hai' has been released. The actors will reprise the roles of 'Tiger' and 'Zoya' in the sequel to the 2012 spy thriller film 'Ek Tha Tiger'. Directed by Ali Abbas Zafar, 'Tiger Zinda Hai' is scheduled to release on December 22.