Welsh actress Eve Myles has been confirmed to play Gwen Cooper - the lead female role in the new Russell T Davies drama for BBC THREE, Torchwood.
Eve will star alongside John Barrowman in the forthcoming 13-part drama that will be broadcast later this year.
The British sci-fi crime thriller for adult audiences will follow the adventures of a team of renegade investigators, led by the enigmatic Captain Jack, played by John Barrowman.
It will see the investigators scavenge alien technology in a very real world to solve crime, both alien and human.
"I'm thrilled to be playing the part of Gwen. To get the chance to do a 13-part series under the watchful pen of Russell is amazing," says Eve.
"It's such a compliment to have been chosen for the part - I can't wait.
"I'm also looking forward to working with John. It'll be the perfect opportunity for the both of us to show everyone what we've got."
Eve Myles guest-starred in the first series of Doctor Who - starring Christopher Eccleston - and recently finished filming Soundproof for BBC TWO.
Her credits also include a highly successful run at the National Theatre when she appeared alongside Michael Gambon in Henry IV Parts I & II.
Russell T Davies says: "I've admired Eve's work for years, and when she was able to guest-star in Doctor Who last year, it just confirmed to me that she was one of Wales's best-kept secrets.
"The part of Gwen in Torchwood was written specially for her - so it's a good thing she said yes!
"Eve and John Barrowman have already met up, and the combination is going to be electrifying."
John Barrowman adds: "I'm really looking forward to working with Eve.
"We've had a good laugh on the occasions we've met and the fact that she's already been in Doctor Who means she knows what she's getting into."
Head of BBC Wales Drama, Julie Gardner, says: "We are delighted to announce the casting of Eve Myles in the central role of Gwen, alongside John Barrowman's Captain Jack in Torchwood.
"Eve is an intelligent and versatile actress, who has done exceptional work in a number of BBC dramas, including our local series Belonging."
Torchwood, a 13-part drama series, starts filming in the summer and will transmit on BBC THREE and BBC ONE.
A BBC Wales production for BBC THREE, Torchwood is written by Russell T Davies and Chris Chibnall, with contributing writers including PJ Hammond and Toby Whithouse.
The producer is Richard Stokes and executive producers are Julie Gardner and Russell T Davies.