This is the 32-year-old actress's first international project in which she will be playing the role of a high-level operative within Pakistan's Inter-Services Intelligence (ISI), according to the Hollywood Reporter.
Nimrat, who is currently shooting in Capetown for the show's fourth season, confirmed the news on Twitter today.
"More than just a sign? #Homeland #Season4 #CapeTown #DreamTeam #latergram," Nimrat posted on Twitter along with the picture of her luggage.
The Indian beauty also confessed that she was not a viewer of the series and watched the pilot after giving her screen test.
'Mad Men' fame actor Mark Moses and Art Malik, best known for playing villain in 1994 action-thriller 'True Lies', have also joined the fourth season of 'Homeland'.
Starring Claire Danes, Rupert Friend, Mandy Patinkin, Tracy Letts among others, 'Homeland 4' will return to TV on October 5.