Sienna Miller’s sister Savannah looks effortlessly stylish in black pinstripe suit as she attends fashion launch

Sienna Miller’s sister Savannah cut a stylish figure as she attended the launch of Matthew Williamson’s new collection with Ruggable at Old Sessions House in London.

The fashion designer, 45, opted for a black pinstripe blazer along with matching trousers for the event.

Savannah, who is three years older than her actress sister, added height to her frame with a pair of black boots and carried a matching handbag.

Letting her blonde locks fall loose down her shoulders, Savannah completed her look with a pair of gold earrings.

Along with the collection launch, Savannah also attended the Stone & Mason AW24 Collection Dinner at Julies in Holland Park on the same evening.

The fashion designer, 45, opted for a black pinstripe blazer along with matching trousers for the event (pictured with Matthew Williamson)

Savannah attended Central Saint Martin’s College Of Art And Design where she graduated with a BA in Fashion and Knitwear.

Her first jobs were with Alexander McQueen and Matthew Williamson before she created the label Twenty8Twelve with Sienna. 

In 2012, she launched her own line called ‘Savannah’ and in 2023, she launched the womenswear brand Vivere. 

In December 2022, Savannah married James Whewell, the heir to the Wyresdale Park country estate in the Forest of Bowland at St Peter’s Church in Petersham, Richmond. 

The designer was previously married to Nick Skinner who she separated from in February 2018. The former couple are parents to three children; Lyra, Bali and Moses. 

Sienna gave birth to a daughter in December 2023 with her boyfriend Oli Green. 

The actress is also mother to older daughter Marlowe, now 12, with her ex Tom Sturridge in July 2012.

And Sienna told Stellar Magazine that she could not recommend late motherhood more highly.

Savannah, who is three years older than her actress sister, added height to her frame with a pair of black boots and carried a matching handbag

Savannah’s first fashion jobs were with Alexander McQueen and Matthew Williamson before she created the label Twenty8Twelve with Sienna (pictured together in 2018)

The American Sniper star welcomed their daughter, whose name she has not revealed, in January.

‘My own experience of motherhood 12 years later is completely different’ the British star told the publication.

‘I’m a very different person. People often have lots to say about having babies in your 40s as women, but I can’t advocate for it more. I feel very lucky.’

Sienna went on to say that she has found it easy to balance motherhood and her career.

‘I’ve just finished maternity leave. My baby is eight months old. It’s great, since this whole focus on the female experience in Hollywood, I can take my baby everywhere and they’ll have to stop filming for me’ she said.