Sienna Miller talks to British celebrity journalist Dean Piper about where her muscles went, how impossible it is to work with Keira Knightley and her new role as Maid Marion in Ridley Scott’s "Nottingham."

Sienna Miller doesn’t admit she’s dating her "Edge of Love" costar/former squeeze Matthew Rhys (best known for playing Calista Flockhart’s gay brother on "Brothers and Sisters." Wait, he’s Welsh?) who may have been responsible for her breakup with now distraught Rhys Ifans.  But the love rumors are flying (with denials), and she does love his accent. Hmmm. Maybe she just got her Rhyses mixed up? I can see that happening.

On her "Edge of Love" costars Matthew Rhys and Keira Knightley: “We all got on really well. It was like the coolest family. We lived in a country house together in Wales, and it was such a laugh, running around in our pajamas. The boys would cook breakfast. We did dinner parties and just bonded so much, and I adore them all. It was springtime, and Wales is the most beautiful place. My dogs were so happy there. I would love to buy a house there one day, I can’t afford it yet — but the Welsh are just such lovely people, so open, so full of … ummm, yeah. I love the accent. Have you spoken to Matthew? His accent is the best!!”

Rhys_ifans___sienna_miller__On breaking up with Ifans and all those rumors: “It’s nice to be talking about this film because I am so proud of it — but the other stuff is very hard to deal with — it sort of overshadows it a bit because I have to talk about it. But I’ve just got back from Prague, so I haven’t seen or read about anything — so for me it’s all about this movie and nothing else.”

On her body: “I’ve just wrapped on "GI Joe," but I’ve lost all my muscles already — they’ve all gone! All the fight scenes were a couple of months ago, and since then I haven’t kept up the exercise regime at all, just so much going on, and I’m not a gym person. I hate it!”

On bosom buddy Keira Knightley: “She is such a movie star — she’s ravishing — it takes a brave women to share a screen with her — she’s a goddess is every way. I adore her. There’s no rivalry, and I think if it’s Kiera Knightley you just have to bite the bullet and go for it and there’s no amount of makeup that will make you look any better!”

On her new movie: “I’m doing a movie with Russell Crowe and Ridley Scott about Robin Hood. I’m Maid Marion to Russell’s Robin Hood – well sort of he plays Nottingham — so there’s no green tights …gutted! I’d love to see him in green tights. Can you imagine?!”

Yes. Yes, we can. And it would not be pretty.

Photos: Sienna Miller, Matthew Rhys and Keira Knightley at the Edinburgh Film Festival for their Dylan Thomas biopic, "The Edge of Love." Bottom, Rhys Ifans and Sienna Miller at the Indie Spirit Awards this year.

Posted by:Elizabeth Snead