A Marriott Hotel worker was left red-faced after failing to recognise guest Tom Cruise and asking him if he had a loyalty card.
The actor, 52, was staying at the hotel in Peterborough while filming his next Mission: Impossible movie and had checked in using the name Operation Fromage, after nearby village Stilton.
A source told The Sun: "Tom took it in good jest, but given the security operation to keep his and Simon's stay under wraps it was funny no one seemed to bat an eyelid."
The star, who is said to be worth £250 million, was staying at the chain hotel with co-star Simon Pegg.
According to the Daily Mail, the pair were filming scenes at RAF Wittering, where Tom was suspended from an Airbus A400M at 5,000ft.
Cruise is known for filming his own stunts, which included running down the world's tallest building, the Burj Khalifa in Dubai, and riding a motorbike at high speed through a crowd of bulls.
While staying at the Peterborough Marriott Hotel, Tom Cruise would have been treated to a spacious en-suite room, use of the indoor swimming pool and dinner at the restaurant serving international cuisine.
In 2012, Tom was spotted tucking into a chicken tikka masala at a curry house in St Albans.
The actor was in the area because shooting scenes for his film, All You Need Is Kill, also starring Emily Blunt, at Leavesden Studios.
Staff at the Veer Dhara restaurant on St Peter's Street said they were more than a little surprised to see their A-list guest.
Restaurant owner Darshit Hora told the Herts Advertiser: "It's very remarkable to have such a legendary Hollywood actor visit our restaurant, it adds well to the selling point! He seemed very relaxed and just wanted to have a nice evening with his family."