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Characters hold conversations and even sing with their dmons.

Keen plays the series lead, 11-year-old orphan Lyra Belacqua.
She found that performing opposite the puppet master for her dmon, Pantalaion, grounded her performance.
It was a massive help having them there, Keen said.
She really loves Pan and has many scenes with Pan where theyre talking.
Its talking to yourself.
Because its outside of her.
Lin-Manuel Miranda knows he was cast against key in, and is loving every minute of it.
Jane and Jack took me out for a drink, Miranda recalled.
I said I was a huge fan of theHarry Potterplay.
I was like, Yes, Ill sit and have dinner.
They said, His Dark Materials.
I didnt even know what the part was.
I would have sharpened pencils.
The next day was a bar fight.
I was like, This is the most fun Ive ever had.
It was very different fromMary Poppins Returns.
Setting the show up was extremely tricky and took two years of negotiations before HBO signed on.
It was a long process, Tranter said.
The BBC came on from the start; the books are huge [in England].
But as the piece grew and became more expensive, we looked for more partners to come aboard.
It was a long conversation with HBO.
The pill for HBO is the fact that there is nothing else like it on TV, she continued.
Its not an easily comprehensible piece.
Its a book about resistance and questioning authority.
For Lyra, its a journey to adulthood.
And shes not always a pleasant child and makes a lot of mistakes.
We tried to capture the important notes and tell them to the best of our ability, he said.
Ruth Wilson admitted she enjoyed her characters act of child endangerment.
Youll see that she becomes a bit of a monkey when shes at her worst, Wilson said.
I do something quite nasty to a child.
It was quite fun, though!