- In Harry Potter and the Chamber of Secrets, Ron"s vomit slugs were in fact, puppets. Rupert Grint chose orange-flavored slime to make the experience more palatable.
- 250 body casts have been made of actors for deaths, petrifications and stunning spells.
- Aragog the acromantula (giant spider) had an 18 ft. leg span
- Over 200 creatures have been created for the Harry Potter film series.
Death Eater Masks:
- The Death Eater masks were created in conjunction with the art department and prop makers.
- The creature effects department sculpted all the masks in a week and the prop team finished the masks, with each featuring an ornate individual pewter design.
- All of the actors that wore them had to have a life cast in cold alginate, which took 2.5 minutes to set.
The hog's head at the Hog's Head Tavern
- Initially, director David Yates wanted three computer-generated wolf heads in the tavern but quickly realized it would be more cost effective to sculpt a full-size animatronic hog's head.
- The hog's head was a silicon-skinned animatronic model that was operated through the wall by technicians.
- Each hair was individually punched in by hand and it took a month to complete.
- A dentist was on standby for many of the young crowd scenes to replace teeth which wobbled and fell out – to prevent continuity issues involving teeth.
- Harry"s infamous scar has been put on by makeup approx 5,800 times. This is not only on Daniel Radcliffe, who has had the scar applied approx 2,000 times, but also on his doubles and stunt doubles, all of whom wear the scar.
- Robbie Coltrane once got a mini-fan caught in his Hagrid beard and had to have it cut out.
- 190 liters of shampoo and conditioner were used on Harry Potter and the Deathly Hallows
- 55 liters of hair tint/hair dye was used on Harry Potter and the Deathly Hallows
- Approximately 2,182 liters of shampoo and conditioner will have been used across all the films, enough to fill 28 bathtubs.