Kapoor, who shot to international fame with his role of a television quiz show host in Danny Boyle's Oscar-winning film 'Slumdog Millionaire', will play an important role in the action franchise.
"At this point I can only say that have been contacted for 'Mission impossible 4' and I have said yes for the role," Kapoor said refusing to divulge details about his role.
The actor is reportedly playing a baddie alongside 'The Girl With Dragon Tattoo' actor Michael Nyqvist, who plays the main villain.
Apart from Kapoor, other major stars roped in for the fourth installment include 'Hurt Locker' actor Jeremy Renner as Cruise's partner, Paula Patton, Ving Rhames and Simon Pegg.
After his 'Slumdog Millionaire' success, Kapoor also got a major role in TV series '24', where he played a leader from middle-east.
The plot of the film, being directed by Brad Bird, remains a top secret.'Mission Impossible 4' is slated to hit theatres on December 16, 2011.
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