Smoke and mirrors! newly-single Charlize Theron puffs a sneaky cigarette on the set of The Huntsman as she prepares to reprise evil Queen Ravenna

She won't stay the fairest of them all for long if she keeps smoking those cigarettes.

Charlize Theron was spotted taking a sneaky puff on the UK set of The Huntsman on Wednesday.

The actress, who celebrates her 40th birthday in three weeks time, is currently reprising her role as the evil Queen Ravenna for the prequel to Snow White And The Huntsman.

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Smoke and mirrors: Charlize Theron was spotted taking a sneaky puff on the UK set of The Huntsman on Wednesday.

Smoke and mirrors: Charlize Theron was spotted taking a sneaky puff on the UK set of The Huntsman on Wednesday.

 While she hadn't yet hit the makeup and wardrobe trailers yet, the star had the wicked stepmother's flowing blonde wig securely in place.

Instead of the queens usual opulent regalia, she wore her own comfortable pair of black trousers and a cosy matching black hoodie.

As an assistant director zipped her around the set in a golf buggy, the Oscar winner could be seen taking a toke on a cigarette... which she quickly hid with a smile when she realised she'd been spotted.

She's back: The actress, who celebrates her 40th birthday in three weeks time, is currently reprising her role as the evil Queen Ravenna for the prequel to Snow White And The Huntsman

Quickie: As an assistant director zipped her around the set in a golf buggy, the Oscar winner could be seen taking a toke on a cigarette

Quickie: As an assistant director zipped her around the set in a golf buggy, the Oscar winner could be seen taking a toke on a cigarette

The mother-of-one can be forgiven for looking for a little stress relief - just weeks ago she split from her fiance, 54-year-old Sean Penn, whom she had been dating for a year-and-a-half.

She reportedly dumped the fellow Oscar winner in May although the exact date of their split is not known, after the pair had been spotted looking loved up together in public numerous times.

On Wednesday, 35-year-old Friday Night Lights actress Minka Kelly denied via Twitter that she was now dating Penn after the two were spotted at her birthday group dinner together.

They have more fun: While she hadn't yet hit the makeup and wardrobe trailers yet, the star had the wicked stepmother's flowing blonde wig securely in place 

They have more fun: While she hadn't yet hit the makeup and wardrobe trailers yet, the star had the wicked stepmother's flowing blonde wig securely in place 

Dressed down: Instead of the queens usual opulent regalia, she wore her own comfortable pair of black trousers and a cosy matching black hoodie.

Dressed down: Instead of the queens usual opulent regalia, she wore her own comfortable pair of black trousers and a cosy matching black hoodie.

Newly single: The mother-of-one can be forgiven for looking for a little stress relief - just weeks ago she split from her fiance, 54-year-old Sean Penn

Newly single: The mother-of-one can be forgiven for looking for a little stress relief - just weeks ago she split from her fiance, 54-year-old Sean Penn

Good run: She reportedly dumped the fellow Oscar winner in May although the exact date of their split is not known, after the pair had been spotted looking loved up together in public numerous times

Good run: She reportedly dumped the fellow Oscar winner in May although the exact date of their split is not known, after the pair had been spotted looking loved up together in public numerous times

'Not my nature to address gossip but hoping this last one goes away already. Not dating a friend I had a group dinner with. #Sillymedia,' she wrote, alluding vaguely to the rumours about her and Sean.

Charlize's latest film is not without its own complicated love story; a planned sequel to 2012's Snow White And The Huntsman was reportedly shelved because it's star Kristen Stewart was caught having an affair with its married director Rupert Sanders.

The two were forced to publish apologies; Sanders wife subsequently divorced him, while Stewart was dumped by boyfriend and Twilight co-star Robert Pattinson.

Game of thrones: The prequel will focus on Theron's Queen Ravenna and Chris Hemsworth's Huntsman

Game of thrones: The prequel will focus on Theron's Queen Ravenna and Chris Hemsworth's Huntsman

Dumped: Kristen Stewart's Snow White won't be back however, after she was caught having an affair with the film's director Rupert Sanders

Dumped: Kristen Stewart's Snow White won't be back however, after she was caught having an affair with the film's director Rupert Sanders

Awkward: The two were forced to publish apologies; Sanders wife subsequently divorced him, while Stewart was dumped by boyfriend and Twilight co-star Robert Pattinson

Awkward: The two were forced to publish apologies; Sanders wife subsequently divorced him, while Stewart was dumped by boyfriend and Twilight co-star Robert Pattinson

Instead, a prequel to the film was then developed which will focus on Theron and Chris Hemsworth's character of the titular Huntsman, and will not feature Stewart at all.

Meanwhile the first film's visual effects supervisor Cedric Nicolas-Troyan will replace Sanders as the director, his first time behind the camera for a full feature film.

The Huntsman, which also stars Emily Blunt, Jessica Chastain and Nick Frost, hits theatres in April 2016.

Peers: The fellow Oscar winners had been dating for a year-and-a-half

Peers: The fellow Oscar winners had been dating for a year-and-a-half

Moving on? On Wednesday, 35-year-old Friday Night Lights actress Minka Kelly denied via Twitter that she was now dating Penn

Moving on? On Wednesday, 35-year-old Friday Night Lights actress Minka Kelly denied via Twitter that she was now dating Penn

Just friends? The actor spotted amongst her friends at her birthday dinner in Napa Valley, California

Just friends? The actor spotted amongst her friends at her birthday dinner in Napa Valley, California

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