Harker is known for her roles as Celia in the BBC's Middlemarch, and as Woman Police Constable (WPC) (later Detective Sgt.)
Harker is married to fellow actor Anthony Calf, with whom she appeared in The Madness of King George[2] and in a TV adaptation of Jilly Cooper's Riders[3] They have three daughters.
From January 2023, Harker starred as Clairee in a production of Steel Magnolias at the Richmond Theatre, London.
[6] In January 2025, Harker debuted as Doctor Caitlin Todd on the British soap opera Emmerdale.
[7][8][9] Harker was born in London, a daughter of actress Polly Adams and actor, Richard Owens.