The "Fury" actor's girlfriend was spotted out at LAX airport on Monday wearing what looked like a big diamond sparkler on her ring finger.
In the photo, the 21-year-old looked casual as she arrived to catch her flight, wearing a furry pink coat, jeans, and sneakers. She accessorized with the brand new rock, which she kept in plan view of the public.
The star has been dating his lady love ever since they met on the set of "Nymphomaniac" in 2012.
Both have remained mum about their relationship, but they are frequently spotted out together. Do you think they just took their relationship to the next level?