Both new and old creatures will pop up onscreen during the sequel, but if you're wondering which Eddie Redmayne is most excited about, wonder no more: baby Nifflers.
"It's probably been my favourite scene to shoot so far, the baby Nifflers. They're just causing havoc and it coincided with the time that I have a 15-month-old child, and the baby Nifflers retain many of the qualities of my 15-month-old," he laughed. "It's been wonderful. It's so lovely because you have the [visual] effects department, who are sort of actors in themselves, coming up with ideas. You then have Jo's book and how she imagined them . . . it's such a collaboration of different spirits."