If you're a big Harry Potter fan, you've probably already seen Fantastic Beasts and Where to Find Them.
And you probably already know that the movie takes place in 1926.
Following the movie's opening weekend, J.K. Rowling revealed a bit of information about the series timeline:
Yep, the series will end in 1945, which is the same year that Dumbledore had his famous duel with Grindelwald!
Which means we might have to wait allllll the way until the fifth movie to see the duel.
But that's OK, just as long as poor Kowalski doesn't end up having to serve in BOTH world wars.
We're just going to have to be very, very patient.