She was one half of the design duo behind successful designer label Twenty8Twelve. But the attention surrounding Sienna and Savannah Miller's fashion venture was firmly focused on the famous sibling.
But following the pair's decision to part with the brand back in January in order to 'explore new pastures', older sister Savannah is finally ready to step out of Sienna's shadow, hoping to find success on her own as she launches her eponymous label.
"I've been hiding behind my sister for long enough. It was really time to stand on my own two feet," she said, speaking at the launch party in London.
And she certainly has the credentials for the job – Savannah has a BA in knitwear from Central Saint Martins and an impressive CV, having worked with Alexander McQueen and 'best friend' Matthew Williamson.
"I am just so excited to have my own label – I can't quite believe it," she said.
And the mum-of-three clearly feels comfortable putting her name to the venture, revealing: "This is so different, this is really me. No big team, just the two of us sitting down together," referring to her new head of designs, Gudrun Kloepsch.
The collection is an individual collection of wearable garments, featuring wardrobe essentials including tshirts, skinny jeans and simple dresses in muted hues.
The Savannah collection is now available exclusively on website Nelly.com.
The Miller sisters announced their departure with a statement wishing their former brand the best.
"We've had a brilliant six years at Twenty8Twelve and are now looking forward to new pastures," they revealed at the time. "We wish the brand the best of luck for the future."
The staff at the Westbourne Grove branch of the label revealed that actress Sienna had left in order "to concentrate on the baby".
However, Savannah denied that the pair's decision to leave was due to family issues. Taking to Twitter, she wrote: "Just for the record we didn't step down at twenty8twelve because of our babies…"
Thirty-year-old Sienna gave birth to a daughter back in July. Shortly after, Savannah tweeted: "I love you Marlowe", confirming the baby's name.
Marlowe is the first child for Sienna and her partner, 26-year-old actor Tom Sturridge who began dating the Alfie beauty shortly after her split from Jude Law in 2011.
One year on, rumours began to circulate that the couple were expecting. Sienna confirmed the good news to British Vogue in March, saying: "I'm feeling fine. It's all progressing nicely, and it's very exciting."