The "Mean Girls" actress, who has been staying in the British capital this summer, was spotted at a London restaurant with Tom Kilbey earlier this month. Days later, he posted a picture of Lohan on Instagram.com with the caption, "Chic day with this one."
They were out on the town together again on Monday at a fashion show for the Moschino design house.
The pair was pictured arriving at the event together, fueling rumors the Hollywood actress has struck up a romance with the former cast member of U.K. TV show "The Only Way Is Essex."
Reports suggest they have been close since meeting in Los Angeles several years ago through Kilbey's work in the fashion industry.