The 32-year-old actress, who is currently shooting in Capetown for its fourth season, took to Twitter to announce the same.
"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.
"Pretty fun for someone who watched the pilot after the screen test! Season 4 Homeland it is," she added.
Nimrat's role in the series has not been disclosed yet.
The actress won international acclaim as the loney wife who starts exchanging notes with a stranger through a misplaced lunchbox in Riteish Batra's 'Lunchbox'.