The Donwton Abbey actress has been looking fantastic at every stop on the promotional trail for the new Disney liveaction movie.
In London's Leicester Square last night, she dazzled on the blue carpet in an unusual strapless gown with large button details.
We're going to be sorry when the publicity for this movie is over as we're LOVING seeing what Lily wears to every event!
Lily plays the title character in Sir Kenneth Branagh's retelling of the classic fairytale, with Game of Thrones's Richard Madden playing her Prince Charming.
The all-star cast includes Helena Bonham Carter as the Fairy Godmother and Cate Blanchett as the Wicked Stepmother, while Lily's Downton Abbey co-star Sophie McShera is one of the Ugly Stepsisters. (A not-so Ugly one, really!)
It arrives on screens 27 March.
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