The 37-year-old Loreal spokeswoman and her husband, actor /*Abishek Bachchan,*/ have kept mum since the news was announced late Tuesday by 68-year-old Amitabh Bachchan on Twitter.
The elder Bachchan tweeted "And so to becoming a Dada!" - meaning grandfather - "The doctors just confirmed it this evening, and I have shared it immediately."
The news triggered a wave of congratulatory tweets from other stars.
There has been speculation in recent weeks after newspapers published photos showing a more full-figured /*Rai Bachchan,*/ who starred in "Bride and Prejudice" and dozens of Bollywood films.
