Miss Guillory is the daughter of Isaac Guillory who was a Cuban born song writer/guitarist.

Sienna is a former model and was educated at a traditional style boarding school.

She is a keen horserider and believes in acupuncture and homoeopathy which is an alternative medicine. She became an actor because she wanted to know what it was like to be other people.

She is a friend of actress Sarah Michelle Gellar.

In August 2004 Sienna and her husband Enzo Cilenti cycled five stages of the Tour De France to raise money for charity, she later said it was more exhausting than long distance running.

She has stated that she does not like the culture of Hollywood and is an ex smoker.

In The Principles Of Lust Sienna had to perform nude scenes, these were all filmed during the first week of shooting the movie, the director Penny Woolcock had an unusual way of filming and would often use raw takes and encourage improvisation, rehearsal was hardly used and despite her nerves over the love scenes she has said it is one of her favourite acting experiences.

Some of her television roles have been in Riders, The Buccaneers, Out Of Sight, Helen Of Troy, Marple, Criminal Minds, The Virgin Queen, Criminal Minds, The Oaks and Virtuality.

You can also see her in films like The Rules Of Engagement, Kiss Kiss ( Bang Bang) Sorted, Oblivious, Late Night Shopping, Rabbit Fever, Star! Star! The Last Minute, Superstition, Love Actually, Two Days, Nine Lives, Eragon, The Heart Of The Earth and The Time Machine.

Films out soon are Perfect Life, I'm Here, Gunless, The Big Bang and Resident Evil: Afterlife.

Read some Sienna Guillory quotes below.

I don't like my nipples showing. They look like targets.

(Talking about her charity cycle in the Tour De France) I used to be a long-distance runner when I was younger, but this is ten times more exhausting.

(Discussing fame during the time when she used to smoke) I went out the other night for the first time in ages, just because I'd been so busy. As I came out of the cinema, I ran down the street to get cigarettes, and 30 guys followed me with cameras and shouted at me. It's all so strange. It's not a life I really live or understand.

(Being interviewed about remake of The Time Machine) After six years of working on low-budget independent films of the too-weird-to-watch variety, being asked by DreamWorks to come and play with the big boys, it was like finding an unicorn in your sock drawer.

(Talking about The Principles Of Lust) We were all in awe of Penny [Woolcock]. You feel so safe with her, you end up doing things that might seem offensive to other people. It's almost like being in a therapy session. You go a little bit further than you would normally. But in the orgy scene, where Marc's really getting a blowjob, I was like, `You've crossed the line!' Me and Alec were acting, and being loving and safe and showing the feeling of wanting to climb under someone's skin. For it to suddenly become something purely physical – I didn't think that needed to be real. But it was a situation that got out of hand. They filmed it at a swingers' club. There wasn't any way of stopping things, once they'd started. It's really gruesome and awful. But for the story, it's perfect. That scene was out of control. But by that point, so are the characters.

(Talking about her early roles) The acting was always disappointing. Silly stories about nonsense people. I felt really cheated by acting, because I've never really felt anything from it. I don't wanna be the women on television, who are always nice and do the right thing. I want to be the woman who makes mistakes and gets away with it. The Night Porter is my favourite film. Charlotte Rampling is boiling with rage and going, "I can do it worse. I'm badder, and dirtier than you will ever be, and you'll never break me." And I just love that. 

(Discussing Resident Evil: Apocalypse) I said I could to get the part. It made me go slightly mad, because my brain would be spinning all night. But after my big fight scene, where it was just kick, kick, kick, turn, in a freezing graveyard at 5am, I remember coming home on fire, because my brain hadn't kicked in once. Which was really, really a relief.

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