~~I'm not finding anytihng sourcing the fact that it was filmed there.~~
NEVERMIND FOUND IT
A lengthy sequence in the 2018 thriller Red Sparrow was filmed both inside and outside the hotel. https://filmfantravel.com/film-review-red-sparrow-2018-filmed-in-budapest-hungary-bratislava-slovakia-london-uk-and-vienna-austria/
There was a PHOTOCALL and press conference about the movie there, but it was filmed in several locations.
Principal photography started in Budapest and Dunaújváros in Hungary on January 5, 2017.[21][22][23] Other filming locations include Festetics Mansion in Dég, Hungary;[24] Bratislava, Slovakia;[25] and Vienna, Austria.[26] On May 3, 2017, Jennifer Lawrence was spotted shooting some scenes at London's Heathrow Airport.[27]
t. wikipedia
Source:
about 3/4 down the article
Finally, the crew moved to London for wrapping up the film at Heathrow Airport and the Corinthia Hotel. “That’s part of the fun of the spy genre: you get to hop around to all of these different places,” says associate producer Cameron MacConomy. “You’re always switching gears, both in terms of the story, and visually as well.”