Paloma Faith enjoys popcorn as she makes demure appearance in elegant dress at Youth premiere alongside boyfriend Leyman Lahcine

She's known for having one of the most vibrant looks in the music industry.

But Paloma Faith considerably toned down her quirky image when she attended the Youth premiere during the 59th BFI London Film Festival in Leicester Square, London on Thursday night, where she made a rare public appearance alongside her boyfriend Leyman Lahcine.

The 34-year-old singer got into the spirit of things, tucking into some popcorn at the Vue West End cinema as she settled down to watch the Rachel Weisz-fronted drama alongside her partner of over a year.

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Tucking in: Paloma Faith chowed down on some popcorn as she prepared to watch new drama Youth during the 59th BFI London Film Festival in London on Thursday night

Tucking in: Paloma Faith chowed down on some popcorn as she prepared to watch new drama Youth during the 59th BFI London Film Festival in London on Thursday night

Paloma - who has a cameo appearance in the film - was the picture of elegance in a pretty black dress with a thigh-high slit running up the back of the skirt.

The classic number was given an added edge thanks to a crossover silk sash and a navy panel at the bust, as well as a glitzy gold caped sleeve on one shoulder.

The new Voice UK coach paired her elegant dress with a small clutch bah and a pair of diamanté encrusted heels.

Rare public outing: Paloma was joined by her DJ boyfriend Leyman Lahcine, who she has been dating for over a year

Rare public outing: Paloma was joined by her DJ boyfriend Leyman Lahcine, who she has been dating for over a year

Makes a change: Paloma is usually a fan of bold colours and clashing patterns 

Makes a change: Paloma is usually a fan of bold colours and clashing patterns 

Leggy look: The 34-year-old singer - who has a cameo appearance in the film - showed off a hint of skin thanks to a slit running up the back of the skirt

Leggy look: The 34-year-old singer - who has a cameo appearance in the film - showed off a hint of skin thanks to a slit running up the back of the skirt

All that glitters: The vocal powerhouse's dress was embellished with a gold caped sleeve on one shoulder
All that glitters: The vocal powerhouse's dress was embellished with a gold caped sleeve on one shoulder

All that glitters: The vocal powerhouse's dress was embellished with a gold caped sleeve on one shoulder

Elaborate updo: Paloma coiffed her blonde locks in a striking braided style

Elaborate updo: Paloma coiffed her blonde locks in a striking braided style

Surprisingly tame: The singer swapped her bright colours and crazy accessories for a far more conservative, classic red carpet look 

Surprisingly tame: The singer swapped her bright colours and crazy accessories for a far more conservative, classic red carpet look 

Paloma wore her blonde locks piled on top of her head in an elaborate, plaited updo and enhanced her features with heavy bronzer and bright red lipstick.

Leyman was dressed to impress in a tweed coat, beret and denim jacket, clearly sharing the same passion for fashion as his girlfriend.

The pair have kept their romance on the down-low until recently, with Paloma confessing, 'I enjoy working hard but I’ve never been in a relationship before that’s made me as happy as I am now.'

Getting along: Paloma chatted to the film's leading lady, Rachel Weisz, at the premiere 

Getting along: Paloma chatted to the film's leading lady, Rachel Weisz, at the premiere 

Scarlet siren: The Voice judge set off her look with a slick of red lipstick and some matching nail varnish

Scarlet siren: The Voice judge set off her look with a slick of red lipstick and some matching nail varnish

Inked up: The star's back tattoo was peeking out from underneath her elegant dress

Inked up: The star's back tattoo was peeking out from underneath her elegant dress

Coordinating to perfection: Paloma's coat and shoes featured glittering gold embellishment to match

Coordinating to perfection: Paloma's coat and shoes featured glittering gold embellishment to match

Catching up: The star chatted to actor Paul Dano as they mingled behind the scenes at the cinema 

Catching up: The star chatted to actor Paul Dano as they mingled behind the scenes at the cinema 

The star has joined Boy George, Ricky Wilson and sole remaining veteran judge Will.i.am on the newly-revamped coaching panel of The Voice, with filming debuting last month.

The upcoming fifth series will no doubt be a marked departure from the past due to the loss of fan favourite judge Sir Tom Jones. 

Paloma recently revealed she certainly wouldn't be sugarcoating her advice to singing hopefuls on the show.

'I’m definitely not cruel and I’m not going on it to upset anybody, but I’m also not there to tell everyone they’re amazing when they’re not', she told the Australian Daily Telegraph.

'I don’t think that’s fair. I want the people I work with to succeed in the music industry and it isn’t like that.'

Terrific trio: Paloma posed alongside the film's stars Rachel and Romanian actress Madalina Diana Ghenea 

Terrific trio: Paloma posed alongside the film's stars Rachel and Romanian actress Madalina Diana Ghenea 

Hello, Hollywood: The star has landed her first movie role in the Paolo Sorrentino drama 

Hello, Hollywood: The star has landed her first movie role in the Paolo Sorrentino drama 

Working it: The BRIT Award-winner was a natural as she made her way along the red carpet

Working it: The BRIT Award-winner was a natural as she made her way along the red carpet

Tasty treat: The star was enjoying her popcorn as she waited for the screening to begin

Tasty treat: The star was enjoying her popcorn as she waited for the screening to begin

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