It might be the biggest party this small west Indian city has ever seen. As billionaire industrialist Mukesh Ambani prepares for the wedding of his son this summer, he's expecting billionaires from around the world, heads of state, and Hollywood and Bollywood royalty to attend a three-day bash in the family's hometown, starting Friday. The nearly 1,200-person guest list includes Bill Gates, Mark Zuckerberg, Sunder Pichai and Ivanka Trump; Indian billionaires Gautam Adani and Kumar Mangalam Birla; legendary cricketer Sachin Tendulkar; and Bollywood celebrities such as Deepika Padukone, Shah Rukh Khan and Rani Mukherjee.