Joining Bruce Willis, Samuel L Jackson and James McAvoy on the white carpet at the Curzon cinema in Mayfair, the Apprentice winner dazzled as she strutted her stuff for the cameras.
Keen to impress, Lord Sugar’s rising star slipped into a skin-tight red number.
Letting her curves speak for themselves the businesswomen beamed away as she turned her sex appeal up to 100.
Featuring a plunging neckline Sian’s gown allowed her to put her killer chest on show.
Pushing up her chest, the starlet squeezed her assets together to create a larger-than-life cleavage.
In fact, Sian’s look was so risqué that it looked like she could spill from the garment at any moment.
Taking to Instagram to show off her red hot look, the brunette beauty shared a string of cheeky selfies along with a plug for her three-man strong glam squad.
Sian won the 2018 series of The Apprentice after impressing Lord Sugar with her luxury swimwear range.
The star told the millionaire that she plans to make reversible bikinis and swimsuits and push them with the help of celebs and influencers on social media.
Bigging herself up at the start of the series, Sian boasted: “I bring both the passion and the fire – in the boardroom, I will be merciless.”
Speaking on the carpet about his role in the upcoming film, Samuel L. Jackson said: “I didn’t read the script at first.
“I was just told to watch the film before this one, Split, and to see what I thought.
“M. Night Shyamalan [ the film’s director] just called and said if this film makes ay money then we will make the third part.”
Insisting it’s not simply a Marvel classic redressed for a different audience, the superstar added: “It’s not a superhero film… it’s a extraudiahry individuals film.
“It’s not super powers as much as it is individuals believing they can do extraordinary things.”