The hotel, which opened in a partnership with Pallazzio Hotels & Leisure marks the entry of the St Regis brand in India and South Asia, Starwood Hotels and Resorts said.
"The introduction of St Regis to India marks a significant milestone for the brand's expansion in South Asia and Mumbai displays a robust demand for high-end hospitality from affluent travellers from all around the globe," St Regis Hotels and Resorts Global Brand Leader Jim Petrus said.
Starwood has already signed a deal in Delhi for the St Regis brand and is looking at opportunities in Bengaluru and Goa, he added.
The Mumbai hotel has 395 guest rooms including 27 suites and for extended stays, the property's 39 residential suites feature a spacious living room, fully equipped kitchenette and the option of one or two bedrooms.
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"We look forward to a long-term collaboration with Starwood Hotels & Resorts," Pallazzio Hotels & Leisure Ltd Director and Phoenix Mills Ltd MD Atul Ruia said.
Dilip Puri MD India and regional VP - South Asia, Starwood Hotels & Resorts said the group has overall 37 properties under its several brands in the pipeline in India, of which 10-12 hotels will open in next 12-18 months time.
Starwood Hotels & Resorts Worldwide has more than 1,270 properties in 100 countries and over 1,80,000 employees at its owned and managed properties under brands such as St Regis, The Luxury Collection, W, Westin, Le Meridien, Sheraton, Four Points by Sheraton, Aloft, Element, and Tribute Portfolio.