Director DJ Caruso confirmed on Twitter that actress Deepika Padukone will return as Serena Unger in the fourth instalment of the 'xXx' franchise. He added that the entire cast, including Vin Diesel, Nina Dobrev, among others, will star in the film. Notably, Deepika made her Hollywood debut with 'xXx: Return of Xander Cage', the third instalment in the 'xXx' franchise.