Kate Siegel’s Adelaide spends the first seven episodes of Carrie as a voice in the dark, then steps in front of the camera in the finale and starts asking the questions that have been hanging over the series all season. In the 2026 Prime Video release, the character finally appears onscreen to interview the survivors of the prom night massacre.
That turn matters because Adelaide is not just another addition to the cast. Siegel described her as the person behind the talking-head interviews that have been teasing the terror to come, while also seeming to be the headmistress of a home for gifted young women. She is the one searching for the culprit behind the carnage, Carrie, and her astral-projecting enabler, Emaline, which makes her both guide and investigator as the story reaches its last stretch.
Siegel said the role felt connected to a strain of Stephen King writing she has carried with her for years, and she tied that connection to something personal. She said she read The Girl Who Loved Tom Gordon 50 times after her father died, calling King her father’s favorite author and saying the book helped her through the grief. She also said she had already seen echoes of Adelaide in The Institute, Carrie, and Firestarter, which gave her a way into a character that had mostly been held back until the finale.
The catch is that Adelaide’s purpose is still slippery. Siegel said viewers do not know which way Adelaide will go, and do not know whose side she is on, even though the character is presented as the one steering the interviews and framing the story. When she pressed Mike Flanagan about Adelaide’s past, future, or identity, she said he answered, “Yeah, it’s crazy, right? Great question,” and moved on. She said she has since been clued in on Adelaide’s potential, but she stopped short of saying where that potential lands.
That uncertainty is what gives the finale its charge. Carrie is already streaming on Prime Video, and the series leans heavily on Stephen King’s original text, but Adelaide’s late arrival changes how the story is being told and who gets to shape it. The question now is not whether she matters; it is whether the woman who controls the camera is standing with the survivors, or with the force that has been hunting them all along.
