The 44-year-old actor has been cast as the younger version of Hogwarts headmaster Albus Dumbledore in the sequel to the "Harry Potter" spin-off.
Law says he wants to meet Rowling, who penned the "Harry Potter" book series, to talk about her vision for the character before he starts shooting the movie, reported BBC.
"My first port of call I hope is to meet JK Rowling and to talk exactly about that and who (Dumbledore) is and who she wants him to be and learn a little bit more about her vision of this great man as a young man," Law says.
Also recently rumoured to be joining the cast is "Glue" actor Callum Turner, who is believed to be playing Newt's brother Theseus Scamander.
"Fantastic Beasts and Where to Find Them 2" is scheduled for release in 2018.
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