In a season of big Indian weddings, the marriage of the scions of two billionaire families might be the biggest of them all.

Isha is the Ivy League-educated daughter of industrialist Mukesh Ambani, thought to be India's richest man. The groom is the son of industrialist Ajay Piramal, thought to be worth $10 billion.

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The car carrying the groom Anand Piramal arrives at the house of Mukesh Ambani in Mumbai, India, Wednesday, Dec. 12, 2018. 

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Reliance Industries Chairman Mukesh Ambani, left, speaks with his son Anant, sitting on a horse. (Picture by AP Photo/Rajanish Kakade)

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Indian Bollywood star Abhishek Bachchan, right, his wife Aishwarya Rai Bachchan and daughter Aaradhya (Picture by AP Photo/Rajanish Kakade)

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Bollywood actress Priyanka Chopra and her musician husband Nick Jonas . (Picture by AP Photo/Rajanish Kakade)

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A street is lit-up outside the house of Reliance Industries Chairman Mukesh Ambani ahead of the wedding

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Reliance Industries Chairman Mukesh Ambani, center left, walks with his brother Anil Ambani​. Picture by AP Photo/Rajanish Kakade)

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Reliance Industries Chairman Mukesh Ambani waits for the arrival of the groom in Mumbai, India​. (Picture by AP Photo/Rajanish Kakade)

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Former Indian cricketer Sachin Tendulkar, left, his wife Anjali and son Arjun (Picture by AP Photo/Rajanish Kakade)