I was living in L.A., and my son was at school there, Ashfield tells EW.

Born to Killstars Jack Rowan, who was recently seen in another British TV show,Peaky Blinders.

Hes so good, says Ashfield.

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Credit: Tristan Fewings/Getty Images

We had a fantastic casting director and sawsomany young people.

The casting of that role was really really critical, and he just got it.

He went on to doPeaky Blinders, and I think hes got a fantastic career ahead of him.

So how is Ashfield enjoying life as a writer?

Its quite exciting to have a whole other career open up to you, she says.

Its just so different from acting, because youre not waiting for some potential script.

Ive got lots of different things bubbling away, writing-wise.

Has she thought about writing a zombie film?

I think, she says with a laugh, Ill leave that to the experts!

Watch the trailer forBorn to Killabove.