Rebecca Blackstone is an American actress who played the computer Pree for the Series X episode "Fathers and Suns".

She notably took part in Ganymede & Titan's "DwarfCast 37 – Fathers & Suns: Instant Reaction", where she was interviewed. The Dwarfcast was released soon after the episode itself had first aired.

Most of her known work is on stage rather than screen, in productions such as The Sunshine Boys with Danny DeVito and Richard Griffiths in the West End.

She also had a small role in the Series XI opener "Twentica" as Big Bang Beryl causing her to appear in another Dwarfcast in 2016.