Cast

"Nine months? How could I forget?"
Linda Black -Courtney Eaton

"We went through hell and back. But at least we did it together, eh?"
Theseus Scamander- Callum Turner

"It's Tina. It's always been Tina."
Newt Scamander- Eddie Redmayne

"...salamanders."
Tina Goldstein- Katherine Waterston

"Make it stop!"
Queenie Goldstein- Alison Sudol

"That's the girl from your trunk! It's trunk girl!"
Jacob Kowalski- Dan Fogler

"You've never met a monster you couldn't love."
Leta Lestrange- Zoë Kravitz

"I need to know who I am."
Credence- Ezra Miller

"They kill the likes of us for sport."
Nagini- Claudia Kim

"They need to know before it's too late."
Albus Dumbledore- Jude Law

"Aurors join me in this circle. Pledge your allegiance to me or die."
Gellert Grindelwald- Johnny Depp

The rest of the cast as themselves

Timeline

So as you probably saw Linda is a Black. Her father is Phineas Black who was cast from the family for being a "muggle rights supporter". Here is the family tree, he is #2.

The next think up is the timeline. A lot of it is kind of unclear in the movies/ lore but I wanted to nail it all down. There are some adjustments but most is the same as the movie. Here they are:
1894: Linda and Theseus are born (instead of '88).
1897: Leta and Newt are born.
1906: Linda and Theseus go to Hogwarts.
1909: Newt and Leta go to Hogwarts.
1910: Leta and Newt become friends (instead of in third year, in second).
1914: Linda and Theseus graduate.
1915: Linda and Theseus pass Auror training and go to war.
1916: Newt is expelled near the end of his sixth year.
1918: The war ends.
1920: Newt leaves.
1926: Fantastic Beasts and Newt Returns.
1927: Present and Crimes of Grindelwald.