Anant Ambani's pre-wedding: Rihanna, Gates and Zuckerberg at India tycoon's gala

Five hundred dishes, more than a thousand guests, and a multi-million dollar budget - this is how the son of Asia's richest man has reportedly celebrated his upcoming nuptials.

Anant Ambani and his wife-to-be Radhika Merchant's three-day extravaganza saw Bollywood royalty rubbing shoulders with tech billionaires, sports superstars, and even Donald Trump's daughter, Ivanka.