Burnt Sienna! Miss Miller shows off her new red locks and casual sense of style as she cosies up to her glam sister Savannah at fashion launch party 

She may be busy shooting her next big movie, but Sienna Miller took time out of her Hollywood schedule to support her older sister Savannah on Tuesday night.

The actress cosied up to her sibling as they celebrated the launch of Nine by Savannah Miller for Debenhams at the The Roof Terrace at the Ham Yard Hotel in London.

While the woman of the hour was glam in a silver mini dress, Sienna kept things low key as she showed off her new red locks.

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We are family: Sienna Miller showed her love for her older sister Savannah at the launch of Nine by Savannah Miller for Debenhams at the The Roof Terrace at the Ham Yard Hotel in London on Tuesday

We are family: Sienna Miller showed her love for her older sister Savannah at the launch of Nine by Savannah Miller for Debenhams at the The Roof Terrace at the Ham Yard Hotel in London on Tuesday

Sienna, 33, dressed down in black skinny jeans teamed with a loose grey sweater for the fashion launch.

She added a furry brown coat over her dressed-down look as she arrived at the party, carrying a yellow leather bag.

The actress added a pair of suede peep-toe shoes and kept her makeup natural, as she cuddled with her sister at the glam launch.

Effortless: Sienna dressed down for the fashion event but still managed to look utterly fabulous

Effortless: Sienna dressed down for the fashion event but still managed to look utterly fabulous

Seeing red: The actress showed off her newly coloured locks as she headed to the fashion bash

Seeing red: The actress showed off her newly coloured locks as she headed to the fashion bash

Low-key look: The 33-year-old kept things casual for her sister's big night in black trousers teamed with a grey sweater and furry coat
Low-key look: The 33-year-old kept things casual for her sister's big night in black trousers teamed with a grey sweater and furry coat

Low-key look: The 33-year-old kept things casual for her sister's big night in black trousers teamed with a grey sweater and furry coat

Designer Savannah looked pretty in a sparkling silver mini dress teamed with a leather jacket and strappy black heels. 

Sienna's casual attire for the night meant much of the emphasis was on her newly-dyed red locks.

The big screen star has coloured her blonde hair for her role in The Lost City of Z, which she's been busy shooting in Northern Ireland.

Hair envy: The Factory Girl actress wore her short auburn locks in soft, natural waves

Hair envy: The Factory Girl actress wore her short auburn locks in soft, natural waves

Me and you: Sienna cosied up to her sister at the launch, with Savannah looking glam in a silver mini dress

Me and you: Sienna cosied up to her sister at the launch, with Savannah looking glam in a silver mini dress

So proud: Sienna looked delighted to spend some time with her sibling after being kept busy filming in Northern Ireland recently 

So proud: Sienna looked delighted to spend some time with her sibling after being kept busy filming in Northern Ireland recently 

Dressed down: Sienna's casual attire for the night meant much of the emphasis was on her newly-dyed red locks

Dressed down: Sienna's casual attire for the night meant much of the emphasis was on her newly-dyed red locks

The actress plays the role of Nina in the period movie based on David Grann's 2009 novel about the British explorer Percy Fawcett, with Nina the wife of Charlie Hunnam's lead.

Helmed by Brad Pitt, the movie is already shaping up to be one of the most star-studded productions of 2016, with Robert Pattinson also starring. 

It's a busy time for the actress as she juggles a string of new roles with life as a mum to her three-year-old daughter Marlow, whose father is her ex-fiance Tom Sturridge, from whom she split earlier this summer.

That's love! Savannah displayed her affection for her sister by giving her a peck on the head as they posed up a storm for photographs

That's love! Savannah displayed her affection for her sister by giving her a peck on the head as they posed up a storm for photographs

New look: The big screen star has coloured her blonde hair for her role in The Lost City of Z, which she's been busy shooting in Northern Ireland

New look: The big screen star has coloured her blonde hair for her role in The Lost City of Z, which she's been busy shooting in Northern Ireland

Family ties: In a new interview with British Vogue, Sienna explains her close relationship with her sister Savannah and her mother

Family ties: In a new interview with British Vogue, Sienna explains her close relationship with her sister Savannah and her mother

Super tight: 'Sienna says her sister and mum are 'hugely important and influential women in my life'

Super tight: 'Sienna says her sister and mum are 'hugely important and influential women in my life'

In a new interview with British Vogue, Sienna explains her close relationship with her sister Savannah and her mother, confessing: 

'I'm really close to them, they are hugely important and influential women in my life, but of course we drive each other nuts as well!'

She added that her close family ties ground her in her hectic life, explaining that since becoming a mother she's learnt to juggle her priorities.

Under the radar: The actress kept her makeup natural and hid behind her hair as she headed to the party

Under the radar: The actress kept her makeup natural and hid behind her hair as she headed to the party

Woman of the hour: Savannah added a leather jacket and black strappy heels to her launch night look

Woman of the hour: Savannah added a leather jacket and black strappy heels to her launch night look

Busy schedule: Sienna looked a little tired as she juggles a busy period in her career with life as a mum to her three-year-old daughter Marlow

Busy schedule: Sienna looked a little tired as she juggles a busy period in her career with life as a mum to her three-year-old daughter Marlow

'Obviously when you have a baby it's the most incredible experience but your life is also catapulted into this chaos and you are exhausted,' she said.

'I could literally get on this table and fall asleep. I'd like to be better at managing things; I'd like to be more super - although we're never going to feel it, even if we are.

'That's the curse of motherhood – we just run ourselves ragged. I'm just trying to get a sense of what that guilt is. I sometimes feel like it's a totally invented emotion. It's strange to be punishing ourselves this way. It's not healthy.' 

Bronzed: The actress sported a golden glow as she hit the soiree to support her older sister

Bronzed: The actress sported a golden glow as she hit the soiree to support her older sister

Bittersweet time: While her career is booming, Sienna has had heartbreak this summer, after splitting from her fiance Tom Sturridge

Bittersweet time: While her career is booming, Sienna has had heartbreak this summer, after splitting from her fiance Tom Sturridge

Support: The actress was no doubt pleased to be back with her nearest and dearest

Support: The actress was no doubt pleased to be back with her nearest and dearest

 

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