Bollywood actors Saif Ali Khan and R. Madhavan had been roped in for a film where the 'Rehnaa Hai Terre Dil Mein' cast was being reunited. And in fact, Saif was Aanand L Rai's first pick to be short-listed for the cast. However, recent reports suggest that not only the script but the cast has undergone changes too and Sidharth Malhotra seems to have replaced Bollywood actor Saif Khan in the film.
The Bollywood movie will be directed by Navdeep Singh and the younger actor seems to have made his way in the cast, replacing Saif. A source explained, "The makers wanted a younger actor to play the lead instead of Saif, after initially settling on him. Madhavan shares a great rapport with Rai, as he's earlier worked in two editions of the 'Tanu Weds Manu' franchise, and he stays in the film. One of the reasons why Sidharth has agreed to do the film is because he knows Aanand makes sensible films, which can get him on steady grounds."
Well, it seem Chote Nawaab understand as senior actor and demand of the movie doesn’t match his profile. However Saif also part of Race movie sequel but not being part of third as he was replaced by Salman Khan.