Lily James' transformation into a Disney princess is complete.

The 25-year-old British actress is swapping the small-screen as Lady Rose in Downton Abbey for the fairytale lead in Disney's new, live-action Cinderella.

The first full-length trailer for the much-anticipated movie has just been released, giving us a good look at the glossy adaptation of the children's classic, crystal slippers and all. It seems to be a faithful take on the tale - the moral being "where there is kindness there is goodness, and where there is goodness there is magic" - with no shocks or surprises to be found in this two-minute teaser. But one thing's for sure, Disney's Cinderella is a seriously star-studded movie...

Introducing, Lily James as poor Cinders. Gorgeous, even with dirt on her face.  

Lily James, Cinderella

Game of Thrones' Richard Madden as her handsome and beautifully blue-eyed Prince Charming: 

Richard Madden Cinderella prince charming

Cate Blanchett as the evil stepmother: 

Cat Blanchett Cinderella

Lily James' Downton Abbey co-star Sophie McShera and Holliday Grainger as the ugly sisters: 

Cinderella Sophie McShera Holliday Grainger

And Helena Bonham-Carter as Cinderella's much-needed Fairy Godmother: 

Helena Bonham Carter Cinderella

Disney's Cinderella also stars Hayley Atwell, Derek Jacobi and Stellan Skarsgard. The film, which follows Disney's 1950 animated film, is directed by Kenneth Branagh. 

Watch the full-length trailer: 

Cinderella will be in UK cinemas 27th March 2015