Legacies actress Bianca Kajlich is the latest name to board Supernatural prequel series The Winchesters.
Gearing up to shoot its pilot for The CW, this one chronicles the "epic, untold" story between Sam and Dean Winchester's parents John and Mary, and "how they put it all on the line to not only save their love, but the entire world".
The Hollywood Reporter confirmed that Kajlich will play Millie, John's mother.
Related: Legacies season 4 brings back two Originals stars
She's described as "hard-working and tough and has done the bulk of parenting in her family for the past 15 years".
"She has always worried John, a Vietnam veteran, would take after his father and wanted to prevent him from pursuing a dangerous life," the character description continues. "She is now coming to grips with the fact that this is exactly what John plans to do."
Jensen Ackles, who'll return as Dean in a narrating capacity, said at the time of the spinoff's announcement: "After Supernatural wrapped its 15th season, we knew it wasn't over. Because like we say in the show, 'Nothing ever really ends, does it?'
"When [his wife] Danneel and I formed Chaos Machine Productions, we knew the first story we wanted to tell was the story of John and Mary Winchester, or rather the Supernatural origin story. I always felt like my character, Dean, would have wanted to know more about his parents' relationship and how it came to be."
Related: Supernatural star Jared Padalecki addresses Jensen Ackles spin-off drama
Elsewhere on The Winchesters casting couch, Station 19 star Nida Khurshid is also heading into this fantasy realm as trainee demon slayer Latika Desai.
Newcomer Jojo Flites has signed up to play the character Carlos Cervantez, too.
The Winchesters will air on The CW.
![Supernatural: The Complete Series [Seasons 1-15, DVD]](https://hips.hearstapps.com/vader-prod.s3.amazonaws.com/1621335910-41GFELrUCOL._SL500_.jpg?crop=1xw:1xh;center,top&resize=980:* "Supernatural: The Complete Series [Seasons 1-15, DVD]")
Warner Bros Supernatural: The Complete Series [Seasons 1-15, DVD]
![Supernatural: Season 15 [DVD]](https://hips.hearstapps.com/vader-prod.s3.amazonaws.com/1621335987-51nc4RXj-ZS._SL500_.jpg?crop=1xw:1xh;center,top&resize=980:* "Supernatural: Season 15 [DVD]")
Warner Bros Supernatural: Season 15 [DVD]
Titan Books Supernatural: The Official Cookbook by Julie Tremaine
Reporter, Digital Spy
Dan is a freelance entertainment journalist. Beginning his writing career in 2014, Dan's work first graced the pages of cult publications Starburst magazine and Little White Lies before moving onto Total Film, Digital Spy, NME and Yahoo Entertainment.
In the film and TV universe, he kneels at the altar of Jim Carrey, Daniel Plainview, Mike Ehrmantraut and Paulie Walnuts.
