Photo: De Agostini/Getty Images Since their lavish pre-wedding celebrations this spring, anticipation has been building for the wedding of Radhika Merchant and Anant Ambani, which begins on July 12 at the Jio Mumbai. Ambani is the youngest son of Asia’s richest person, and his fiancée, as it happens, is also an heir to a billionaire family in India. To understand how the superrich wed, we spoke to Julian Posner and Jamie Simon, the CEO and head of events, respectively, of Banana Split.