Make-up free Sienna Miller is a far cry from her glamorous red-carpet self as she leaves hotel in slouchy jumper and grey tracksuit bottoms during film festival

She’s known for her red-carpet fashion prowess, but on Wednesday afternoon Sienna Miller looked a far cry from her usual glamorous self.

The 33-year-old, who is gearing up for the release of new movie High-Rise, stripped back the style credentials for a low-key look as she left her hotel during San Sebastian International Film Festival.

Making her way through the crowds, the British actress was sporting a simple, yet, a bizarre mismatched ensemble, consisting of a slouchy red jumper and grey tracksuit bottoms.

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Quite the change: Sienna Miller stripped back her red-carpet style credentials for a low-key look as she left her hotel during San Sebastian International Film Festival on Wednesday (pictured left)
Quite the change: Sienna Miller stripped back her red-carpet style credentials for a low-key look as she left her hotel during San Sebastian International Film Festival on Wednesday (pictured left)

Quite the change: Sienna Miller stripped back her red-carpet style credentials for a low-key look as she left her hotel during San Sebastian International Film Festival on Wednesday (pictured left)

With her tresses tied into a carefree ponytail, Sienna drew attention to her pretty facial features with round-rimmed glasses as she kept her makeup to a bare minimum.

Just 24 hours earlier, the beautiful star managed to turn heads in a loose-fitting satin frock as she hit the red carpet at Kursaal Palace for the premiere of her new film.

She dressed her toned curves in a scoop-neck, copper satin Galvan gown which skimmed her svelte frame, leaving little to the imagination as she opted to go bra-less for the occasion.

Bold move: Making her way through the crowds, the British actress was sporting a simple, yet, a bizarre mismatched ensemble, consisting of a slouchy red jumper and grey tracksuit bottoms

Bold move: Making her way through the crowds, the British actress was sporting a simple, yet, a bizarre mismatched ensemble, consisting of a slouchy red jumper and grey tracksuit bottoms

Going natural: With her tresses tied into a carefree ponytail, Sienna drew attention to her pretty facial features with round-rimmed glasses as she kept her makeup to a bare minimum

Going natural: With her tresses tied into a carefree ponytail, Sienna drew attention to her pretty facial features with round-rimmed glasses as she kept her makeup to a bare minimum

The reported ex-fiancee of fellow actor Tom Sturridge, with whom she shares a daughter, Marlowe, posed alongside co-stars Tom Hiddleston and Luke Evans.

The film, directed by Ben Wheatley, tells the story of residents of a tower block, whose lives start to spiral out of control.

The stellar ensemble piece also stars Jeremy Irons, Elisabeth Moss, James Purefoy and Keeley Hawes with Sienna taking on the role of Charlotte Melville.

Stunning display: Just 24 hours earlier, the beautiful star managed to turn heads in a loose-fitting satin frock as she hit the red carpet at Kursaal Palace for the premiere of her new film

Stunning display: Just 24 hours earlier, the beautiful star managed to turn heads in a loose-fitting satin frock as she hit the red carpet at Kursaal Palace for the premiere of her new film

Channel Sienna's minimal style in her Galvan slip dress

Sometimes less is more and Sienna Miller proved this to be true when she arrived on the red carpet at the San Sebastian Film Festival in a Galvan slip dress.

The American Sniper star wore her blush toned gown with nothing but a long necklace, a slicked back bun and red lipstick.

We're all for the usual sequins, prints and embellishments that celebrities usually wear to big events, but Sienna's minimalist look eschewed all of the frills for a modern and refreshing sight.

This exact look is not available, but click right to get a similar style at Matches Fashion. Then head down to the carousel below for our alternative selections - all budgets covered.

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Star-studded: The reported ex-fiancee of fellow actor Tom Sturridge, with whom she shares a daughter, Marlowe, posed alongside co-stars Tom Hiddleston and Luke Evans

Star-studded: The reported ex-fiancee of fellow actor Tom Sturridge, with whom she shares a daughter, Marlowe, posed alongside co-stars Tom Hiddleston and Luke Evans

Meanwhile, the actress recently admitted she turned down a major role on Broadway after finding out her male co-star was going to be paid more.

Sienna told Vogue: 'It was a play with just two of us on stage and I was offered less than half of what he was going to be paid. If it was two men, it wouldn’t probably happen. Sad, but I walked away.

'The producer… wouldn’t pay me within a million miles of what the male actor was being paid. And women always have to do more publicity than the men.

'The only way is to make a stand. We are going to have to make sacrifices to make change. I want to turn up and feel dignified.'

Classy: Sienna showed off her envy-inducing figure as she arrived at the 63rd San Sebastian International Film Festival in Spain’s mountainous Basque Country on Tuesday

Classy: Sienna showed off her envy-inducing figure as she arrived at the 63rd San Sebastian International Film Festival in Spain’s mountainous Basque Country on Tuesday

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