The actress said that last September, the company approached her to be the voice of their new conversational AI system, which she declined. Then in May of this year, CEO Sam Altman contacted her again, asking her to reconsider. Before she could respond, OpenAI released a demo of its new technology featuring a voice called "Sky" - which many have suggested bears an uncanny resemblance to Johansson's character in the 2013 movie "her," in which she's the voice of a super-intelligent AI assistant.

"When I heard the released demo, I was shocked, angered and in disbelief that Mr. Altman would pursue a voice that sounded so eerily similar to mine that my closest friends and news outlets could not tell the difference," she wrote, adding: "Mr. Altman even insinuated that the similarity was intentional, tweeting a single word 'her' — a reference to the film in which I voiced a chat system, Samantha, who forms an intimate relationship with a human."

Here's her statement as read in the voice of Sky: