This time the Downton Abbey actress was dazzling in Elie Saab Couture at the Japanese premiere of Cinderella, held in Tokyo on Wednesday evening (8 April).
What a stunner!
Lily shone in the beautiful made-for-a-princess frock while joining the movie's director Sir Kenneth Brannagh for the screening.
Earlier in the day, she'd attended a photocall and press conference where she was presented with a Cinderella-themed birthday cake to mark her 26th birthday which fell over the weekend.
Lily stars as Ella in the live action retelling of the Disney classic, which stars Game of Thrones' Richard Madden as Prince Charming, Helena Bonham-Carter as the Fairy Godmother and Cate Blanchett as the Wicked Stepmother.
Cinderella topped the UK box office on its release at the end of March, taking in £3.8 million. It earned £43.1 million in the US on its opening weekend as well.
Watch Lily and co-star Richard Madden in the clip below: