“With Jacob, in the third movie, you’re gonna see that this whole business with the wizards – it’s taken a toll on him. Things are getting more serious. He’s definitely still a gregarious soul and has the biggest heart in the world, but he’s getting…

“At the start he [Yusuf] was a character who transformed into an animal. There was a lot more prosthetic work, so it amused me a lot. I already saw myself transforming into a bird, etc. And when I was told that we were removing this part, I was…

“He [Dumbledore] was very close to going round the world and conquering the world with Gellert Grindelwald and suddenly it was like he caught himself, so I think he’s always pulling back and, in a way, what we’re seeing in this younger version, is a…

Has he fully given up hope that Grindelwald can come back to his side? “I don’t think he gives up on people, no, I think he still believes that there might be a possibility of turning him. The reason I stick to that isn’t anything…

“I think they [Leta and Newt] were probably still quite close even when Newt goes to America, which is why I think it’s such a jarring thing to come home and find I’m engaged to Theseus. We’ve all known each other for a really long…

“I also think there are four love stories in this [film] and I think that that one [Dumbledore and Grindelwald] is the deepest, the purest love and the others just don’t come close.” Source: YouTube

“I play Theseus Scamander, Newt’s older brother. He’s risen through the ranks of the establishment insanely quickly and he’s the Head Auror. And he’s trying to save the world in the way that he thinks best, which is through the establishment, through laws. And he’s…

“She [JK Rowling] had thought he [Theseus] might be a little harder, and then when he [Callum] came in with so much compassion and his interpretation of that role was so complete, that apparently she adjusted some things for that.” Source: YouTube

“He is, I think, very very fond of Newt because he knows this guy has a barometer of high morals. That he can rely on this man who has very specific and special skills, but is driven, ultimately, by doing good. And I think he…

An interesting relationship with Newt. You’re his brother and about to marry someone he was in love with. This is complicated: “It is complicated but I think that the important thing to realise is that it wasn’t a full relationship. It was a companionship at…