Cinderella's dress in the new movie

You're referring to the 2015 Disney live-action remake of Cinderella, starring Lily James as Cinderella!

The iconic blue ball gown worn by Cinderella in the movie was designed by Academy Award-winning costume designer Sandy Powell. The dress was a stunning, floor-length, strapless gown made of silk and tulle, with a fitted bodice and a full, flowing skirt.

The dress was inspired by the classic Disney animation, but with a more realistic and detailed approach. Powell wanted to create a gown that would be both beautiful and believable, taking into account the historical context of the story.

The dress was made up of over 500 pieces of fabric, including silk, tulle, and organza. It took a team of over 20 people to create the dress, including seamstresses, embroiderers, and beaders.

The dress was also adorned with intricate details, such as delicate beading and embroidery, which added to its overall beauty and romance. The dress was so stunning that it even won the Academy Award for Best Costume Design in 2016!

Overall, the blue ball gown in the 2015 Disney live-action remake of Cinderella is a breathtakingly beautiful creation that has become an iconic part of the Cinderella story.