When we first heard Katherine Waterston had been confirmed as Eddie Redmayne's leading lady in the Harry Potter spin-off movie Fantastic Beasts And Where To Find Them our initial reaction was 'who?'
Although the 35-year-old actress may not be a household name (yet), we imagine that come November 2016 her name will be the name on everybody's lips as she portrays Porpentina in the movie adaption of J K Rowling's prequel to the Harry Potter series. The one with Eddie Redmayne.
Not much has been revealed about the movie, but we do know that it is set around the tales of Newt Scamander - the man wrote the textbook Harry and co studied at Hogwarts.
Given that David Yates, who directed the last four Potter movies, is also on board it's only natural Potterheads everywhere are expecting big things from the upcoming film. So we thought we should probably clue ourselves up a bit on Katherine Waterston. Here's what you should know...
1. Her father is Sam Waterston
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**The American actor played Jack McCoy in Law & Order and more recently for his portrayal of Charlie Skinner in hit TV show The Newsroom.
**2. She's already got a few A-List pals **
Katherine starred alongside Reese Witherspoon, Owen Wilson and Joaquin Phoenix last year in Inherent Vice, an American crime-comdey directed by Paul Thomas Anderon.
3. And she doesn't mind stripping off
One of the more memorable scenes from* Inherent Vice* captured a fully naked Katherine Waterston being violently spanked by Joaquin Phoenix. Speaking about the scene to the Huffington Post, Katherine said: "There's maybe a moment where you gulp, but then, for me the scene was so much fun to play that I didn't really think about it too much."
4. She married to Michael Fassebender (kind of)
Okay fine the pair aren't actually married, but Katherine did portray Michael Fassebender's wife in Jobs, the upcoming biopic about Steve Jobs. The film also stars Kate Winslet and Seth Rogen.
5. She starred in Boardwalk Empire
The actress played Emma Harrow in seasons 3 and 4 of the Golden Globe winning TV series.