Sienna Miller is back to her festival best in billowing boho dress as she attends British Summer Time Festival in London

By William Lee Adams For Mailonline

Published: | Updated:

She routinely glams up for the red carpet, working high fashion looks from the world's most sought-after designers. 

But on Saturday actress Sienna Miller left the couture at the door as she rocked her festival best at the British Summer Time Festival in London's Hyde Park.

The 34-year-old stunner nailed the boho-chic look, wearing a flowing black dress that featured an elaborate pattern of paw prints, hand prints and guitars, among other things.  

Stepping out: On Saturday actress Sienna Miller rocked her festival best at the British Summer Time Festival in London's Hyde Park

Stepping out: On Saturday actress Sienna Miller rocked her festival best at the British Summer Time Festival in London's Hyde Park

Despite covering the entirety of her legs and stomach, the quirky dress featured a V-shaped cut-out beneath the neck, offering a tempting glimpse of her stunning décolletage.  

The mother-of-one carried an oversized black leather handbag, which matched her outfit perfectly and likely held water, snacks, make-up and other supplies for the musical extravaganza. 

As practical as she is gorgeous, the American Sniper star wore a black, zip-up cardigan over the dress and also carried a large denim shirt, making it easy for her to layer-up should the temperatures plunge as the sun sets. 

Festival-ready: The mother-of-one carried an oversized black leather handbag, which matched her outfit perfectly and likely held water, snacks, make-up and other supplies for the musical extravaganza

Festival-ready: The mother-of-one carried an oversized black leather handbag, which matched her outfit perfectly and likely held water, snacks, make-up and other supplies for the musical extravaganza

Quirky: The 34-year-old stunner nailed the boho-chic look, wearing a flowing black dress that featured an elaborate pattern of paw prints, hand prints and guitars, among other things
Cheers! Getting into the festival spirit, she carried a plastic cup of beer, which no doubt slipped down easy

Quirky: The 34-year-old stunner nailed the boho-chic look, wearing a flowing black dress that featured an elaborate pattern of paw prints, hand prints and guitars, among other things

Layers: As practical as she is gorgeous, the American Sniper star wore a black, zip-up cardigan over the dress and also carried a large denim shirt, making it easy for her to layer-up should the temperatures plunge

Layers: As practical as she is gorgeous, the American Sniper star wore a black, zip-up cardigan over the dress and also carried a large denim shirt, making it easy for her to layer-up should the temperatures plunge

Standing tall: The Golden Globe nominee gave herself extra height in a pair of leather boots with decorative buckles and an extra high platform heel

Standing tall: The Golden Globe nominee gave herself extra height in a pair of leather boots with decorative buckles and an extra high platform heel

The Golden Globe nominee gave herself extra height in a pair of leather boots with decorative buckles and an extra high platform heel. 

Obviously enjoying her time with girlfriends, Sienna carried a cup of ice and a bottle of beer, while a friend carried a bottle of wine, which no doubt slipped down easy as they enjoyed music from an impressive roster of acts. 

Hanging with gal pals at the festival, Sienna is keeping her fans guessing about her relationship, with former fiance Tom Sturridge, with whom she parted ways last summer.  

The former couple - who have never confirmed the details of their break-up - were seen enjoying a lunch date in London in April, the first public sighting of the pair since December.

Day out: Obviously enjoying her time with girlfriends, Sienna carried a cold beer

Day out: Obviously enjoying her time with girlfriends, Sienna carried a cold beer

Looking low-key, the twosome emerged from a Chinese restaurant, with the 34-year-old actress leading the way.

Sienna and Tom, who share three-year-old daughter Marlowe, had been together for four years and engaged for three when reports emerged that they'd split last summer. 

This year the PlayStation Music stage returns for fourth year to British Summertime Festival, showcasing eclectic artists, including Rae Morris, Grace and Jamie Lawson. 

Check out Spotify available on PlayStation Music on PlayStation 4 or PlayStation 3.

Where my girls at? Sienna searched for friends in the busy crowd, apparently having fetched drinks for a friend

Where my girls at? Sienna searched for friends in the busy crowd, apparently having fetched drinks for a friend

Music time: This year the PlayStation Music stage returns for fourth year to British Summertime Festival, showcasing eclectic artists, including Rae Morris, Grace and Jamie Lawson

Music time: This year the PlayStation Music stage returns for fourth year to British Summertime Festival, showcasing eclectic artists, including Rae Morris, Grace and Jamie Lawson

Girl time: Sienna was all smiles as the sun set and she chatted with her friends

Girl time: Sienna was all smiles as the sun set and she chatted with her friends

 

London

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