The fabric literally floats.

The Daily Mail has an interview with Sandy Powell, the creator of Lily James’ ridiculously gorgeous Cinderella ballgown. She revealed some of the secrets behind the iconic dress and they’re fascinating:

1. There are eight versions of the gown, and they’re all different. “One was 2 inches shorter and a couple were 4 inches for the times when Lily had to run; another had holes cut in the sides of the skirt for harness work.” It took 4,000 hours to make all eight versions.

2. The layers upon layers of the skirt are made out of a material so incredibly light that it literally floats when it’s thrown in the air. (It’s also crazy-expensive!)

3. If Lily had to go to the bathroom with the dress on, they gave her a mini camping portable potty to slip under her dress! (Talk about roughing it.)

4. The designers aren’t allowed to say how much it cost to make the dresses, but estimates put it at about $12,000 each.

5. The corset and the crinoline (skirt cage) are made out of steel.

6. The trickiest thing Lily had to do in the dress was dance with the prince; he kept tripping on it! (Which, duh.)

7. There is three miles of thread in the hems and 250 metres of fabric in each dress.

8. It took Lily 20 minutes to get the dress on! Which is surprisingly less time than I would’ve imagined considering everything involved.

And yes — you can buy a replica of the dress for your formal.

The dress costs $495 and is only available at promgirl.com and simplydresses.com