The actress showcased her incredible figure at the event in London
The 43-year-old actress flaunted extreme cleavage in the silk frock that showcased her enviable physique.
The dress featured a black belt at the waist which highlighted her svelte figure as she posed for photographers at the event.
In one image, Kate's ample assets looked to be spilling out as she went bra-free in the daring gown that also flashed her lean pins with a high thigh-split.
She teamed the flowing ensemble with a pair of strappy heels and gold drop earrings as her luscious locks were left styled in loose waves.
Kate Beckinsale showed off her ample assets in the plunging gown
Kate Beckinsale, 43, flashes abs as she strips down to steamy ensemble
London Film Critics Circle awards 2017 WINNERS LIST: La La Land, more
Kate Beckinsale beamed as she made her way into the awards show
Kate was named Best British/Irish Actress of the Year for her role in Whit Stallman’s Jane Austen comedy Love and Friendship.
She opened up about her late father Richard Beckinsale of Porridge fame and said to ES Magazine: "There were an awful lot of things to do with being my father's daughter that weren't just tragic."
The Notting Hill actress also also recounted her days at Oxford University, revealing that she and her actor pal Alan Davies, as well as Roy Kinnear's daughter Kirsty, developed a "dead parents club".
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Kate Beckinsale won an award for British/Irish Actress of the Year
Naomie Harris scooped an award for Supporting Actress of the Year for her role in Moonlight
Critics' Choice Awards 2016
Mon, December 12, 2016
Nicole Kidman, Kate Beckinsale & Amy Adams lead the star-studded blue carpet for the annual Critics' Choice Awards in Santa Monica, California.
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Nicole Kidman, Kate Beckinsale & Amy Adams lead the star-studded blue carpet for the annual Critics' Choice Awards
Elsehwere, Naomie Harris looked incredible at the event as she took home an award for Supporting Actress of the Year for her role in Moonlight.
Wearing a tight fitted black dress, the actress flaunted her impressive toned arms as she clutched her trophy.
La La Land starring Emma Stone and Ryan Gosling swept the board once again as they continue their winning streak this awards season.
The musical won Best Film on the night as is expected to win big at the Oscars next month.