Waterston has recently been inSteve JobsandInherent Viceand also has the upcomingAlien: Covenanton the way to theaters.

ENTERTAINMENT WEEKLY: How did Fantastic Beasts first come into your life?

KATHERINE WATERSTON: In the normal way that really great things show up, which is in an email.

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Credit: Courtesy of Warner Bros. Pictures

Then at that audition, I thought it really couldnt have gone worse.

Why, what happened?

So I thought, Oh, Im boring him.

You start wanting to play the scenes.

What excited you most about it?

Its just such a wild thing to come into, this Harry Potter legacy.

But it does just come down to the script, like any other job.

Are these characters fascinating?

And then greed is always an element when you read a script: Do I really love this character?

Theres kind of no rhyme or reason to what is appealing to any given actor.

It just is or it isnt.

Its kind of like dating.

You either connect to someone or you dont.

You cant really say why.

I just loved Tina and felt a connection to her.

Whats been the most surprising thing about coming into this already established world?

Its almost like when youre on a football team or something.

You have your fans and they believe in you, but you still have to win the game.

There are people who have really high expectations for what were doing.

You want to be loose.

You have to figure that your character is going to have some comparisons to Hermione.

Are you kind of prepared for that?

Its not something Im thinking about at all.

So I guess Im not prepared!

Do you have a favorite beast?

One of the most endearing things was watching [star Eddie Redmayne] interact with the beasts.

Its so beautiful to watch him.

Hes worked out all these different dynamics with all the different beasts.

Like Eddie, you got to design your own wand too.

And this is like: What do you think?

What is Tinas wand?

And Im like, Oh my God.

What wand would choose Tina?

And there were all these different kinds, and they would tell different stories.

Are you going to become a really important witch?

So that was a really fun part of it.

But I did ask for it to be heavier.

It just didnt feel powerful enough.

What made that one right?

And if I explain it, Ill reveal too much about my character.

Ill tell you later?

Some previous highlights:

Fantastic Beastsrevealed a new wizard power.

Redmayne detailedexactly how he picked the wandfor his Newt Scamander character inBeasts.

Redmayne revealed hisfavorite Harry Potter movie and book.