Because the allegations of sexual assault and abuse centre around Hollywood, many real celebrities are brought under the spotlight, both in "She Said" and the real New York Times investigation, but not all were fully present for the film.
Actress Ashley Judd, who plays herself in the movie, is a key voice who talks about her experience and is one of her first celebrities to go on the record for the article. A scene where Kantor and Twohey visit Gwenthyn Paltrow at her home in the Hamptons for an interview reveals the "Shakespeare in Love" actress was another one of Weinstein's victims, but her face is never shown in the movie.
Other actresses, like Rose McGowan, are only heard through phone calls and images in "She Said," but McGowan's voice is portrayed by Kelly McQuail. Donald Trump's voice is also re-created, voiced by "Saturday Night Live" actor James Austin Johnson at the beginning of the film, when Twohey is investigating his sexual assault allegations in 2016.
In terms of portraying Weinstein in the film, actor Mike Houston voiced the former producer in scenes where the NYT talked to him over the phone, and only his profile is briefly seen in a meeting with Twohey and other lawyers in the newsroom, so the viewers never see his face. The only point in "She Said" where Weinstein's real voice is used is when a real police recording of model Ambra Battilana Gutierrez and Weinstein having an aggressive interaction while she was wearing a wire plays in the background of empty hotel hallway footage, which became a key piece of evidence that led to Weinstein's conviction.