Matthew Williamson is celebrating his 15th anniversary in fashion at the moment, and our Sienna is involved! First off, he mentioned Sienna in an interview with Grazia:

1. Do you have a muse?
MW: No. I find working with one person in my mind a little limiting. I have many muses!

3. Of all the women who have worn your designs which were you more excited about?
MW: I’ve got to say someone other than Sienna haven’t I?! But really I do get excited every time I see someone wearing my clothes. Even if I see someone on the street I go ooooo! It’s not always about celebrity – I’ve been excited about everyone who looks good in my clothes from Beyoncé to a girl I once saw sat in Claridges wearing one of my jackets. Whenever I see someone wearing my clothes I always try and tell them they look lovely.

And Matthew has also created a short film to commemorate the anniversary, and Sienna is seen posing and modelling his clothes in it. Below is the behind the scenes of the shoot video, and then the film itself. Screencaptures will be added to our Gallery soon.

If you’ve seen any other mentions of Sienna in relation to Matthew Williamson’s 15th anniversary then please leave a comment!

“Matthew has an innate understanding of women, and you never have a better time than when wearing his clothes. It’s just full of this sense of fun that he radiates.” As Sienna Miller, Poppy Delevingne and Valentine Fillol-Cordier join Matthew to celebrate his 15th anniversary with the film ‘XV’, we go behind-the-scenes at Aynhoe Park as the day of filming unfolds.

The special short film stars Sienna, Poppy and Andrea Riseborough and is directed by Tell No One. The film features eight ballerinas from the Royal Ballet, choreographed by the acclaimed Wayne McGregor, founder of the Random Dance company. With original script by Mark Whelan, the collaborative film makers Luke White and Remi Weekes created the mini movie as a snapshot into the imagination of a 15-year-old Williamson, dreaming up his very own fashion fantasy with a very down-to-earth twist at the end.

The film will launch on Wednesday 31st October on net-a-porter.com and swarovski.tv.

Matthew Williamson with Swarovski has created a magical short film to celebrate his 15th anniversary.

Stars Sienna Milller, Poppy Delevigne and Andrea Riseborough wear dresses created with thousands of Swarovski Elements in this fantasy tale.

Directed by Tell No One and shot at the imposing 17th century country house, Aynhoe Park in Oxfordshire, the film features eight ballerinas from the Royal Ballet, choreographed by the acclaimed Wayne McGregor, founder of the Random Dance company. With original script by Mark Whelan, the collaborative film makers Luke White and Remi Weekes created the mini movie as a snapshot into the imagination of a 15-year-old Williamson, dreaming up his very own fashion fantasy with a very down-to-earth twist at the end.

Matthew Williamson is launching a limited edition collection of Swarovski encrusted dresses and clutches as part of the celebrations. The collection is available exclusively on NET-A-PORTER http://www.net-a-porter.com/Shop/Designers/Matthew_Williamson

Matthew Williamson Creates Anniversary Fashion Film

FASHION dreams do come true – just ask Matthew Williamson, who celebrated 15 years in the industry this year and made a short film to commemorate the event.

“It’s about the dreams of my 15-year-old self imagining this ethereal universe full of beautiful girls in these amazing dresses,” explains the designer who enlisted the help of friends Sienna Miller, Poppy Delevingne and Valentine Fillol Cordier to make it. “I was also really thrilled to work with the amazing Andrea Riseborough too who plays my mum.”

While Riseborough makes for a great cameo, don’t expect to see her in this on the big screen – it’s a small screen celebration in conjunction with Swarovksi and Net-A-Porter, which is where you can catch it next week when it launches online.

So, dreamy dresses aside, what advice stands out over the past 15 years and what he might tell his 15-year-old self now?

“Confidence and belief in yourself and your vision is absolutely paramount. The fashion industry is tough – be prepared to take advice and criticism along the way, but have unwavering belief in your vision,” says Williamson.

And what’s up for the big 2-0 when that hits?

“This is the next incredibly exciting time for the brand and we hope to take it to the next level. So ideally the big 2-0 will be bigger and better. I’m looking forward to now adding new layers to the DNA of our brand as we begin the next chapter in our story,” he says.

- Vogue.co.uk