The duo received several good luck wishes after the news of her wedding date was revealed.
Acknowledging the wishes, Dia took to Twitter to post: "Thank you for all the good wishes:) Both our families are overjoyed! A wedding that we've truly waited for :) #Blessed #Grateful"
The wedding will take place in Delhi, and Dia is later likely to host a lavish reception for her friends from the world of entertainment.
Dia and Sahil co-own movie production banner Born Free Entertainment.