Guests have received invites with a one-minute video clip that has a montage of the couple, set to a popular Hindi song.
The families celebrated their engagement earlier at a party in Goa on March 24. The wedding is likely to take place in December.
"Welcome to the family. But the truth is that Shloka has been a part of our family since as far as I can remember. Diya (Shloka's sister) and I were in school together, and Diya is the first best friend I ever had. And, by relation, Shloka has also been my best friend since...I don't know, I can't even remember a time in my life when I didn't know Shloka...Our family feels complete in a way that it never did before. So, welcome to the family," said Akash's sister Isha Ambani after the grand do in Mumbai on March 28.