Eddie Redmayne had to lock his 'Fantastic Beasts And Where To Find Them' script in a safe.
The 34-year-old actor - who stars as magizoologist Newt Scamander in the fantasy film - has admitted he occasionally defied the team's orders to keep the script under lock and key and "smuggled" it home with him.
He said: "I never ever have done a film where you have to literally lock up the script in a safe. First, you're not really allowed a paper script. I was like, 'I need a script to write notes on it.'"
Asked if he could take the script home with him from time to time, he added: "Not really. Occasionally, I would smuggle my script home."
And Eddie - who has five-month-old daughter Iris with his wife Hannah Bagshawe - also found out about the role in a "wonderfully top-secret way".
He added: "It came to me in a wonderfully top-secret way. I got a call, saying David Yates wanted to meet me about an unknown project. We met in a pub called Blacks, which is in Soho in London.
"As I went to this place, it was pouring rain, and downstairs in the basement, there was a fire and David. The whole thing had a Diagon Alley vibe to it.
"He started telling me this story that J.K. Rowling was writing, and he talked about Newt and the case. I had taken a suitcase that I had. As he talked more about the case, I gently pushed my case back. I had this embarrassment that I looked like one of those actors that turned up dressed for the part."
Eddie fulfilled a childhood dream by using a wand in the 'Harry Potter' spin-off movie.
He shared to Variety.com: "It's an odd thing, there's nothing more weird, without spoiling the scene, when [a character] is whipping you with electricity.
"It's like 'Fifty Shades of Wand'. There's no way to talk about wands without going to catastrophic innuendo."
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