appeared to jump into character with ease as she lit a cigarette while filming the '60s thriller Boston Strangler on Sunday afternoon.
The 36-year-old actress portrays journalist Loretta McLaughlin who uncovered a series of murders that took place between 1962-64 in the area.
Knightley seemed to be in great health months after she contracted a breakthrough case of at the end of the year despite being double vaccinated.
Hard at work: Keira Knightley appeared to jump into character with ease while filming the '60s thriller Boston Strangler on Sunday afternoon
Keira sported a dark green overcoat with a navy blue sweater peering out from underneath as snow fell on the production.
Her dark brown hair was worn short and tightly curled, and her makeup was kept simple with a red lip and bold brows.
She carried a brown leather purse across her shoulder while chatting with a few co-stars on set.
The 36-year-old actress sported a dark green overcoat and lit a cigarette while filming an outdoor scene in the snow
Keira portrays journalist Loretta McLaughlin who uncovered a series of murders that took place between 1962-64 in the area
The film is based on the Boston Strangler murders that took place from 1962-64 which left 13 women dead.
Directed by Matt Ruskin, the flick also stars Carrie Coon, David Dastmalchian, Rory Cochrane and Chris Cooper.
Keira described her challenging battle with COVID-19 in an interview with the Sunday Telegraph's Stella magazine.
Lucky in love: She is married to Klaxons musician James Righton and they share two daughters, Edie, six and Delilah, two; seen in 2019
She is married to Klaxons musician James Righton and they share two daughters, Edie, six and Delilah, two - who she revealed fared better than her.
She said of her asymptomatic husband: '[He is] being very smug about it – he is convinced it's because he's one of those cold-water swimmers and I'm not.'
The actress admitted she was 'feeling pretty rubbish.'
A rep for the actress told PEOPLE that Keira and her husband were fully vaccinated and completed their required 10 days in quarantine.