The richest family in India, the Ambani's threw a grand party in honor of the Mayor of London who is now on an official tour across India.
Later in the day, a bash for Khan was hosted at Mukesh Ambani's residence.
After attending a charity football match during the day with Ranbir Kapoor, Khan had a gala time with Bollywood biggies in the evening. Other prominent stars who were invited included people like Katrina Kaif, Alia Bhatt, Sridevi and Boni Kapoor, Juhi Chawla, Farah Khan, Karan Johar and many others.
Khan, who arrived in Mumbai today as a part of his visit to India to boost economic and cultural ties said, "The key message I am bringing to India is that London is open for talent, business and partnerships".
Sadiq Khan with Bollywood actor Ranbir Kapoor
Deputy High Commissioner in Mumbai Crispin Simon and Mumbai Mayor Vishwanath Mahadeshwar were also present, reports news agency PTI.
"An honour to meet cricketing legend - The Master @sachintendulkar. #LondonIsOpen", the London's mayor wrote this for the Tiger Zinda Hai actress. He further said that the success of Katrina Kaif in Bollywood is another example of the deep connection shared by Mumbai and London.
By seeing his captions for all his pictures, it seems that Sadiq Khan enjoyed the star-studded bash! On Monday, Indian businessmen networked with those from United Kingdom to understand how investment in technology could be made between United Kingdom and India. Thank you to the Ambani family @karanjohar & @milinddeora for hosting an incredible evening with business & creative industry leaders to mark my trip to Mumbai.