Jab Tak Hai Jaan and upcoming movie Zero's co-stars Shah Rukh Khan and Katrina Kaif were the first to arrive to congratulate the newly-engaged couple, who may tie the knot later this year.
Shah Rukh was looking charming as usual in a black suit, while Katrina was looking stunning in a chic peach-colored dress. Ace filmmaker Karan Johar, Kiran Rao and Natasha Poonawalla also arrived at the Ambani residence for the party.
Aishwarya Rai Bachchan, looking gorgeous as always, also attended the function with her daughter Aradhya Bachchan.
A day after an intimate ceremony in Goa where Akash Ambani proposed to his classmate Shloka Mehta, the Ambanis visited Siddhivinayak temple in Mumbai on Ram Navami to seek blessings.
Shloka is the daughter of prominent diamantaire, Russell Mehta.