reflected on working with fellow mother Carrie Coon on their upcoming film Boston Strangler, as she discussed juggling parenting with acting.
The actress who plays investigative journalist Loretta McLaughlin in the Hulu crime drama, said she was 'fortunate' that the stars 'had each other's backs.'
Keira shares daughters Edie, seven, and Delilah, three, with her musician husband James Righton.
At a recent press conference, she explained : 'I felt very fortunate, particularly with Carrie, because we're both mothers of two small children.
'There is something very nice about coming on to a set and just looking into another woman's eyes and having total understanding — that was just a joy.'
Insight: Keira Knightley reflected on working with fellow mother Carrie Coon on their upcoming film as she discussed juggling parenting with acting (pictured in December)
Lucky: The actress who plays journalist Loretta McLaughlin in Boston Strangler, said she was 'fortunate' that the stars 'had each other's backs' (L-R Carrie Coon and Keira in the film)
The star added: 'We could both look at each other through our completely sleepless eyes and be like: 'Alright mate. I've got your back.'
Carrie plays Keira's character's colleague Jean Cole in the upcoming film, who wrote a series of articles about the killings in Boston - including one which linked the apparently unrelated murders for the first time.
In the thriller, which is based on a true story, Kiera and Carrie, portraying the reporters, begin to dig deeper into the infamous criminal to uncover his identity.
During the trailer, which hit and social media, Kiera's character asks: 'How many women have to die before it’s considered a story?'
It is based on the 13 women who were murdered in the Boston area in the early 1960s - to which to being the Boston Strangler serial killer after being charged in rape cases.
With the new release set to hit streaming service on March 17 2023, the trailer takes viewers back in time to the 1960s set.
Beginning in the newsroom of the Boston American Record newspaper, Keira's character can be seen looking through news clippings and making a connection between recent crimes.
Family: Keira shares daughters Edie, seven, and Delilah, three, with her musician husband James Righton (pictured in 2020)
Support: At a recent press conference, she explained : 'I felt very fortunate, particularly with Carrie, because we're both mothers of two small children' (pictured in November 2022)
Tarred with the sexism of the time, Loretta (Keira) struggles to get the backing to investigate the crimes, and ends up going off on her own tangent.
'I think I've found something, three women were strangled over the last two weeks,' says Loretta to her editor in the trailer's first moments.
Despite working on the publication's Lifestyle desk, the character is keen to investigate the project herself as she makes the first connection between the recent murders.
Claiming to tell the 'untold true story' during the film, the trailer continues as more murders take place and the police investigation amps up a notch.
Loretta goes on to delve deeper into the case as they appear to have a suspect, as her colleage Jean Cole (Carrie Coon) helps to uncover the truth.
Putting her jobs and life at risk, Keira's character takes matters into her own hands by entering the address of the suspected killer with a baseball bat - as the trailer dramatically depicts her journey to learning the real story.
True story: The film is based on the 13 women who were murdered in the Boston area in the early 1960s
The true story took place between 1962 to 1964, when single women across Massachusetts were the target of a serial killer and rapist - with at least 11, a thought 13, losing their lives.
As the case was investigated by Boston authorities, the far locations of each woman left them at a loss of who could be the culprit.
Eventually, convicted rapist Albert DeSalvo made a jailhouse confession claiming that he was the Boston Strangler and provided details on the 11 murdered women.
But he was later found dead in his jail cell, before the case had been fully solved. It was eventually closed in 2013, when recent advances in forensic science confirmed that it was DeSalvo with DNA proof.