The Dementor costumes were created by Nick Dudman and his team at Creature Effects and were designed to be both intimidating and otherworldly.
Here's how they were brought to life:
* Stunt performers: Highly skilled actors were chosen for their agility and ability to move convincingly in the large, cumbersome costumes.
* Costumes and masks: The Dementor costumes were made from a combination of latex, fabric, and foam, creating a skeletal, gaunt appearance. The masks were hand-painted and designed to be extremely pale and emotionless.
* Post-production: Visual effects were used to enhance the Dementors' appearance, adding to their eerie and menacing presence.
So, while there were many talented performers involved in bringing the Dementors to life, they didn't actually "play" the characters in the traditional sense.