The wizarding world of 1921 in Fantastic Beasts and Where To Find Them
Potter fans, exciting confirmed news wizarding its way to you as Eddie Redmayne has been cast as Newt Scamander in Fantastic Beasts and Where to Find Them.
The three-film series will be set 70 years before the Harry Potter story begins.
They're based on the charity book released in 1997 for Comic Relief by JK Rowling.
Far from Hogsmeade and Hogwarts, this new world is set in New York.
Warner Bros say the Oscar-winning actor will play the magizoologist "who in his travels has encountered and documented a myriad of magical creatures, ultimately leading his penning the Hogwarts School textbook Fantastic Beasts and Where to Find Them".
So we know Harry Potter starts school in 1991. From our lessons in Arithmancy (OWL level) we can do the maths.
Newsbeat assumes then that Newt and his fantastic beasts will be in NYC around 1921. The wizarding world as we know it, was totally different back then.
The Hogwarts headmaster
The headmaster at Hogwarts is Phineas Nigellus Black - and you may recognise that his face appeared in one of the portraits that hung in Dumbledore's office.
He's the one who gets messages from 12 Grimmauld Place to Dumbledore's office in the Order of the Phoenix book.
He's the great-great grandfather of Sirius Black (Harry's godfather).
If you believe what you read on Wikipedia, he's also a bit "snippish and surly".
At Godric's Hollow
Dumbledore is still living at Godric's Hollow. He isn't even a teacher yet, never mind headmaster.
He's really old in the books and has been at the school forever.
His timeline is a bit difficult to work out but this is around the time he starts fancying Gellert Grindelwald.
Yeah, if you missed it Dumbledore is gay.
At Little Hangleton
Remember Frank Bryce? The gardener muggle for the Riddle family who Voldemort murders at the beginning of Goblet of Fire?
Well, he's about four years old. He has his whole life ahead of him and no idea he'll be accused of murders he didn't commit.
Speaking of the Riddles, Tom is not yet born which means He-Who-Must-Not-Be-Named isn't terrorising the world and London bridges are safe.
Did you know the Dark Lord was 71 when he was killed?
The Quidditch pitch
This is the time that Quidditch gets owned (before Harry came along and did it all again).
Roderick Plumpton, the seeker for the Tutshill Tornados, catches the golden snitch in a record three and a half seconds.
By doing this he invents the Plumpton Pass against the Caerphilly Catapults.
What JK says
Writing on her Facebook page in 2013, JK Rowling said: "Although it will be set in the worldwide community of witches and wizards where I was so happy for 17 years, Fantastic Beasts and Where to Find Them is neither a prequel nor a sequel to the Harry Potter series, but an extension of the wizarding world.
"The laws and customs of the hidden magical society will be familiar to anyone who has read the Harry Potter books or seen the films, but Newt's story will start in New York, 70 years before Harry's gets under way."