Given their penchant for extraordinarily lavish social engagements, it should come as little surprise that the Ambanis have topped the list of the wealthiest people in the world. The family is number one in a run-down of the most valuable family businesses in , with a valuation that is equivalent to 10 per cent of the country's GDP, according to a Barclays-Hurun report. Reliance Industries, which is part of the family's £239.

47 billion empire, runs India's leading conglomerates in petroleum refining and marketing, oil and gas, organised retail, telecommunication, and other digital streaming services. According to , Nitin Singh, head of Barclays Private Bank, Asia Pacific, said: ‘India is a complex country. It is made up of states and various things.

It rewards people who know how to work in this complex environment. And I think that is what multi-generational businesses have been able to do over the years; they've been able to thrive in working in this complex environment.’ One way in which the Ambanis display their extraordinary fortune? Their global property empire.

The family home in – a 27-storey private apartment block named Antilia – is valued at £1.56 billion, making it the world's second most expensive residence after Buckingham Palace. Situated on the moneyed Altamount Road in the south of , the luxury home has three helipads, a 168-car garage, multiple swimming pools, four levels of gardens, plus a 50-person cinema.

The family also own a 100-year-old mansi.