Elizabeth Olsen and Tom Hiddleston were spotted dining together in London, England, on Thursday.
The pair grabbed dinner at glamorous The Wolseley restaurant until late in the evening.
Olsen, 26, wore an all-black ensemble, with her hair in a high ponytail for the outing, while Hiddleston, 34, was sporting glasses, a simple white V-neck and a black peacoat.
The rumored couple just completed filming a movie together, Hank Williams' biopic I Saw the Light.
Hiddleston portrays the country singer, while Olsen plays his wife, Audrey Mae Williams.
RELATED VIDEO: How Is Chris Hemsworth Changing Things in Avengers: Age of Ultron?
Both stars also play characters in Marvel's big-screen superhero universe. Olsen starred as Scarlet Witch in Avengers: Age of Ultron, among other movies, while Hiddleston has portrayed Loki in three of the comic book empire's blockbusters.
Olsen was previously engaged to actor Boyd Holbrook. The couple reportedly split in January 2015.