The Oscar winner, 48, was spotted leaving the Nobu restaurant and heading to the Claridge’s hotel in Mayfair.
She’s currently in Europe to promote her upcoming crime comedy The Heat, costarring Melissa McCarthy, with whom Bullock has become close.
“Having kids connected us on a deeper level,” Bullock told Parade recently. “And the things we re obsessed with outside of being a mom are the same, too.”
The Heat opens June 28 in the U.S.