On Thursday, Jennie posted the photo on her Instagram with 82 million followers, showing her standing outside the restaurant called PHO S82, specializing Vietnamese street food.
After one hour, her photo attracted more than 1 million likes. As of Friday, it gained over 3.8 million likes and 22,500 comments.
The restaurant is located at 10 Little Turnstile in London.
Pho, Vietnam's national dish, is traditionally served with chicken or beef broth where the bones simmer for at least three hours.
Many restaurants in London have been serving the soup for the Vietnamese community there.
Last week, Jennie and other Blackpink members attended activities at Buckingham Palace and received special treatment from King Charles III.