Teeth Casts
A whole cast had dental casts made in case someone lost a tooth! The children were all 10-year-olds in the first Harry Potter film, Harry Potter and the Philosopher’s Stone, which is why they all had to have dental casts. According to Radcliffe, “Cause you’ve got a set full of twenty 10-year-olds… they would cast everyone’s mouths,” since there was always a chance the small kids would lose one tooth while shooting, so they had to be replaced by a fake one!
Dudley’s Weightloss
Between movies, the actor who played Dudley Dursley lost so much weight. Dudley’s change from overweight to healthy is recorded in the books. However, between films, actor Harry Melling lost so much weight that the makeup team had to develop a fat suit and unique facial prosthetics for him. Despite this, owing to his drastic weight reduction, the majority of his scenes had to be deleted.