Sienna Miller's designer sister Savannah announces 'miracle' pregnancy at 47


Savannah has announced she's pregnant with her fourth child at the same time as her actress sister


The Miller sisters will have seven children between them© Dave Benett/Getty Images for Sav
March 22, 2026
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Fashion designer Savannah Miller had shared an emotional message revealing she's pregnant at 47 with her "miracle baby". Savannah, who is the older sister of actress Sienna Miller, who is also currently pregnant, showed off her noticeable baby bump in a sweet photo with her new husband James Whewell. 

"Our longed for miracle baby is joining the gang in August!" the 47-year-old wrote on Instagram on 21 March. "To be able to relive the magic of pregnancy, with Jim, who is the most deserving and dedicated dad already to my three, is a profound and phenomenal gift," she added. Savannah shares teenage children Moses, Lyra and Bali with her ex-husband Nick Skinner, whom she split from in 2018. She then tied the knot with James in 2024. 

"Now I know how brief it all is, on the cusp of my firstborn’s 21st birthday, I hope to be able to slowly savour the innocence and wonder in every minute," she continued, mentioning her eldest child, whom she welcomed when she was 26.

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"To be doing it all over again at the same time as my sister is the most delicious cherry on the icing on the cake," Savannah added. Her younger sister Sienna, 44, announced she's expecting her third child while walking the red carpet at The Fashion Awards in December. 

Sienna's pregnancy reveal

Sienna revealed her surprise pregnancy ahead of the awards show when she arrived in a sheer dress, clearly showing off her baby bump. The star already shared a teenage daughter, Marlowe, with her ex Tom Sturridge, and welcomed a daughter in 2024 with her current partner Oli Green.

Oli Green and Sienna Miller pose on the carpet at Fashion Awards© Getty
Oli Green and Sienna Miller attending the Fashion Awards 2025 at the Royal Albert Hall

The Anatomy of a Scandal star attended The Fashion Awards with her partner Oli, whom she has been dating since 2021.  

Savannah's 800-acre estate

Savannah spends her time between her husband's 800-acre family estate in Lancashire, Wyresdale Park, and their family home in Stroud Valley, Gloucestershire. The designer spoke to HELLO! about her home life and James' recent months-long work overseeing a "massive renovation" on his family estate to transform it into a gorgeous wedding venue. 

"In the last couple of years I've slowly been getting more and more involved in Wyresdale Park. My life brings me up here to be with James. He's done a complete overhaul of the venue, building an amazing outdoor ceremony garden which has elevated the property into a whole new category," she told us exclusively.

Savannah Miller and James Whewell © Dave Benett/Getty Images for Sav
Savannah Miller and James Whewell

Savannah's three teenage children live with her at their family home in the Cotswolds, which they moved into in 2023. "I've lived in the Stroud area for 20 years – my kids go to school in Cheltenham – so we bought our place so we could have our home there. In the week, James goes up north to work and I either go with him or stay in the Cotswolds, depending on what the kids are doing," she said. 

She continued: "We chose the mill because it's very remote, in the bottom of a valley. It has a beautiful garden with a stream running through it. It's paradise, but it truly doesn’t function like a normal property. It's basically elevated camping in that our hot-water system is very temperamental, but it's extremely inspiring, peaceful and the antithesis of London. I find it really nourishing being there."

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