The deal, arranged by hotel property advisers Colliers International, sees Lake Opportunities Limited take ownership of the Berkshire building.
Oakley Court, which also hosted the Team GB rowing and canoeing teams during London 2012, was put on the market in June after it fell into administration.
The hotel is understood to have generated unprecedented interest and a considerable number of offers, after which a single party was provided with "preferred bidder" status.
Julian Troup, head of UK hotels agency at Colliers, said: "Oakley Court hotel is one of the finest and most renowned country house hotels in England and the result that was achieved exceeded our expectations. We were able to generate interest from right around the globe and the structured process ensured delivery of a very favourable result.
"This is further evidence that buyers are prepared to consider the real estate value and reflect potential in the offers they submit. There are some real signs of positive sentiment from hotel buyers and this is supported by a greater appetite from banks to support UK provincial hotel purchases."
The property has 118 bedrooms, including 11 suites, and comes with meeting and conference facilities and a nine-hole golf course set over 33 acres.
Originally built in 1859 as a private residence, Oakley Court's Gothic style made it the ideal location to be used as a film set for Dracula. It was also was used as Frank-N-Furter's castle in the cult classic Rocky Horror Picture Show and the school in St Trinian's.
The hotel's film connections benefited from its situation in 33-acres of grounds overlooking the River Thames, adjacent to Bray Studios.
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