The 24-year-old actress slipped into a skintight red dress that was designed to look as if it were completely see-through and she was bra-less underneath.
She attended the swank affair with her 29-year-old elder sister Dani Thorne, who posed with her on the red carpet.
Morbius follows a vampire supervillain of the same name who originates in Marvel comics, but the movie is from Sony rather than the Marvel Cinematic Universe.
Out on April Fool’s Day, the film is led by Jared Leto amid a star-studded cast that features The Crown alumni Jared Harris and Matt Smith.
Bella selected a skintight ensemble that showed off her sensational curves to full advantage as she turned this way and that at the premiere.
Letting her strawberry blonde hair tumble freely over her shoulders, she sharpened her features with makeup including a slick of deep red lipstick.
Bella balanced expertly on a glinting pair of wine-colored stilettos and added a splash of dazzle to the look with rings and a watch.
Meanwhile Dani opted for a racy take on biker girl chic, clasping on a plunging black leather bra-lette that flashed plenty of flesh.
Her platform black leather boots and matching high-cut mini-skirt emphasized her shapely legs as she stood beside her sister for the shutterbugs.
For a bit of added flair she accessorized the ensemble by modeling a black leather choker that was studded with metallic spikes.
Dani’s platinum blonde hair was streaked with red and aquamarine highlights, complementing the makeup she wore.
Bella’s dress was designed by one Sergio Castano Pena, who explained the thinking behind his work on his Instagram page.
‘This project takes a stance against war, violence and oppression,’ he wrote. ‘As well I totally do not support lacks of democracy, freedom or human rights.’
While heading to the evening’s festivities Bella fired up her Insta Stories to post a bit of footage of herself and Dani in the car.
Bella stuck her tongue sultrily out for the camera as the sizzling sister act danced along to Perfect by Cousin Stizz featuring City Girls.
As far as her love life is concerned Bella, whose history has included Mod Sun and Scott Disick, is currently engaged to Italian heartthrob Benjamin Mascolo.