Thin and thinner: Sienna Miller and Keira Knightley cut lean figures at red carpet premiere
Hollywood actresses Sienna Miller and Keira Knightley share an appetite for success, but not, it appears, fatty food.
The costars cut very lean figures as they hit the red carpet for the premiere of their new film, The Edge Of Love, in Edinburgh tonight.
Sienna sashayed along in a black dress trimmed with long fringing while Keira opted for a cream one-piece and sparkling black jacket.
The duo are in the midst of a promotional blitz for Dylan Thomas biopic, which also stars Matthew Rhys.
Lean girls: Sienna Miller and Keira Knightly at tonight's premiere of Edge of Love in Edinburgh
Matthew and Siienna have been at the centre of romance rumours amid reports their closeness was the catalyst for the end of Sienna’s year-long romance with actor Rhys Ifans.
A host of other stars turned out for the premiere, including Sean Connery, with his arm in a sling, and Joely Richardson.
Meanwhile, earlier today Keira insisted she did not feel under any extra pressure by starring in a film penned by her mother.
Edge of fashion: Sienna and Keira face off
The actress said she was "very proud" of the film, written by Glasgow-born playwright Sharman Macdonald.
Speaking in Edinburgh, the star also revealed how she was "terrified" and her knees turned to jelly when she was told she would have to sing on set.
Knightley and her co-star Sienna Miller were in the Scottish capital for the opening night of the Edinburgh International Film Festival (EIFF).
Love triangle: Sienna with co-star and ex-boyfriend Matthew Rhys, and Keira Knightly. Her closeness to the actor allegedly caused problems between Sienna and Rhys before they split
For the first time in its 62-year history, the event is being held outside the main festival month of August.
The 12-day spectacle officially gets under way with the world premiere of The Edge Of Love.
The film stars Miller as Caitlin, the wife of Welsh poet Thomas, and Knightley as Vera Philips, his childhood sweetheart.
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At a press conference at Edinburgh Castle today, Knightley insisted she did not feel under any extra strain because her mother was behind the screenplay.
"Because Shar wrote it, it wasn't any more or less than normal," she said, adding that she always wanted to give her best in every movie.
"I'm very, very proud of this film. It's very, very close to me.
"But, no, I didn't feel a particular pressure because she's my mum.
"I mean, in a funny kind of way, I've obviously grown up with her writing so I understand it and it seemed very natural, which was fantastic."
Macdonald has been reported as saying she could not watch her daughter shooting the sex scenes in the film.
But Knightley appeared to display a more relaxed attitude to appearing in a sex scene written by her mother.
"It certainly didn't worry me that my mother actually knows what sex is," she joked.
"It's a story about relationships. It's a story about how friendship can be ruined over an act of betrayal in the form of sex.
"You're not really going to get out of the fact that there is going to be sex involved in it."
And she insisted the scene in which she bares her breasts was not a reaction to talk in the media about her body image.
She said jokingly: "It was very simple. It was a sex scene and I never like them when they've got bras on.

"He (the director) said, 'Take your bra off' and I said, 'All right then'."
Knightley went on to reveal that she was only told she would have to sing on set - in front of up to 200 extras - on the day it was being filmed.
"It was terrifying. I wasn't particularly pleased that Shar had put singing into the script anyway," she said.
"I thought I was going to die. My knees actually started buckling and the first couple of takes I sounded like a pubescent boy.
"Then somebody very kindly bought me a couple of shots of vodka and everything was all right after that."
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