Keira Knightley's Sienna envy

May 8, 2007, 11:30 GMT

Keira Knightley - Hollywood, CA © Glenn Harris / Photorazzi

Keira Knightley wants to be Sienna Miller.

The actress wishes she had the "amazing" social skills of Sienna, because she struggles to think of anything to say at showbiz parties and ends up "grinning aimlessly" at strangers.

Keira is quoted as saying: "At parties, I stand on my own, grinning aimlessly. I can never think of a thing to say. I wish I was Sienna Miller. I watch that girl and she is just fabulous. She talks to everyone and laughs and smiles. She looks as if she is genuinely enjoying herself. When I talk to her, I hope a bit of her party personality will rub off on me but it never does. She could give master classes in being the most amazing party guest."

As well as hating parties, Keira has also developed a phobia of walking down the red carpet.

The 'Pirates of the Caribbean' actress is paranoid she will be ridiculed for her choice of dress at premieres and awards shows.

Keira, 22, said: "I've become phobic about the red carpet because you come under intense scrutiny. I always think I'm going to make it into the top ten of some worst dressed list. I really do try, but I'm just no good at that stuff."

Keira is currently shooting new movie 'The Best Time Of Our Lives' - which was written by Keira's mother Sharman Macdonald and is about the life of Welsh poet Dylan Thomas - alongside Sienna.

The 'Factory Girl' actress, who plays Dylan's wife Caitlin, replaced Lindsay Lohan in the movie after Lindsay pulled out of the project following a dispute with the film's financiers.

Keira and Sienna are set to have an on screen threesome with actor Matthew Rhys, who will play the hard-drinking poet.

(C) BANG Media International