Mumbai: Antilia, home to the richest business family in India, is on course to celebrate a double wedding this year.

Isha Ambani, daughter of Mukesh Ambani, whose fabled wealth exceeds $40 billion, appears set to marry industrialist Ajay Piramal's son Anand in December.

Last month, Akash Ambani, Isha's twin, was engaged to Shloka Mehta, youngest daughter of Russell Mehta, owner of the Rosy Blue empire and one of the world's largest diamantaires. Their engagement ceremony was held in March at a five-star resort in Goa.

Anand Piramal, the 32-year-old scion of the $10-billion Ajay Piramal group, proposed to Isha at a temple in Mahabaleshwar, a hill town located in the Satara district of Maharashtra, this weekend. Anand and Isha have been long-time friends.

Sources confirmed that the marriage would take place in December and in India - around the same time Akash Ambani's wedding is scheduled.

Isha and Anand celebrated the occasion with a lunch with their respective parents, Nita and Mukesh Ambani and Swati and Ajay Piramal.

Isha's grandparents, Kokilaben Ambani and Purnimaben Dalal, and brothers Akash and Anant were also present along with Anand's elder sister Nandini, her husband Peter DeYoung and their children Anya and Dev.

Anand is the founder of Piramal Realty, the Piramal Group's real estate arm, which has over 15 million square feet of land under development, mostly in Mumbai.

The Piramal group heir - older sister Nandini too is a director of Piramal Enterprises, the group's flagship company - returned to India in 2011 and founded Piramal Swasthya, a rural healthcare initiative.

Goldman Sachs and Warburg Pincus, international equity partners, together invested $434 million in Piramal Realty, making it one of the largest private equity investments in Indian real estate.

Anand, executive director of the Piramal group, has a bachelor's degree in economics from the University of Pennsylvania and a master's in business administration from Harvard Business School. He is also the youngest president of the youth wing of the 100-year-old Indian Merchant Chambers.

Isha, 25, holds a bachelor's degree in psychology and South Asian studies from Yale University and will be completing her master's in business administration from the Graduate School of Business, Stanford, by June.

She is a director on the board of Reliance Jio and that of Reliance Retail, the two fully owned subsidiaries of Reliance Industries that have been driving the Reliance Group's diversification into new areas of opportunity.