In this exclusive video, supervising creature puppeteer Robin Guiver lets us behind the scenes to see how some of the beasts of Crimes of Grindelwald became an onscreen reality.

Bringing a fantastic beast to life can be physically exhausting, especially when it's as big as a Zouwu. Robin Guiver gives us a glimpse at what it's like to grapple with a larger-than-life puppet and explains how Eddie Redmayne is an 'endurance athlete' of the imagination.