The British Daisy Edgar-Jones had to work closely with dialect coach Francie Brown in order to master the southern American accent for her role as Kya.
The song that Chase sings to Kya in bed is "Long Black Veil," a 1959 Lefty Frizzell folk ballad about a man who refuses to give an alibi when charged for a murder he didn't commit.
Daisy Edgar-Jones (Kya) auditioned with a self-recorded tape she filmed on the set of her series War of the Worlds (2019).
When Chase asks, "I wonder what makes the sky blue?" Kya answers, "Blue and violet wavelengths from sunlight ... bounce off the gas particles in the atmosphere and scatter." In physics, this is called Rayleigh scattering. A similar phenomenon, called the Tyndall effect causes blue eyes to be blue when there is no blue pigment in humans.
Taylor Swift insisted on writing the song "Carolina" for the film, only after she learned that actress Daisy Edgar-Jones and Reese Witherspoon (as producer) were both involved.
Delia Owens: The author of the novel is seen in the courtroom sitting on the front row behind Tom when Patti is testifying about Chase's shell necklace.