Killing Eve is a dramatic thriller revolving around a psychopathic assassin and the woman charged with hunting her down.

Waller-Bridge, who is best known for her RTS Award-winning comedy Fleabag, spoke to the RTS about the project earlier this year.

“It’s basically a game of cat-and-mouse between two women who in a lot of ways are very opposite to each other, but who become obsessed with and by each other,” she explained.

Waller-Bridge added of the casting, “I am quivering with excitement about working with Sandra! I have been a huge fan of hers forever and am pinching myself that she is playing our Eve. She is going to be so badass in this role.”

The show is based upon a series of novellas by Luke Jennings, and follows Eve, a bored, whip-smart security services operative who dreams of being a ‘real’ spy, and Villanelle, and elegant, talented killer who lives the life of luxury that her violent job affords her.

Oh is best known for her work on Grey’s Anatomy as Dr Christina Yang which earned her a number of awards including a Golden Globe and an five Emmy nominations.  

Sarah Burnett, President of BBC America, said “Sandra Oh has the ability to go from wrenching to funny to total mess with a genius lightness of touch.  Phoebe’s vision is absolutely original, and Sandra is utterly perfect casting we think for this key role.”

Killing Eve is due to air on BBC America next year and is produced by Sid Gentle Films. A UK broadcaster is yet to be confirmed.