Sharon Duncan-Brewster (born 8 February 1976) is a British actress. She is known for her role as Imperial Planetologist Dr Liet-Kynes in Denis Villeneuve’s 2021 adaptation of Frank Herbert’s Dune, and before that, as Crystal Gordon in Bad Girls during the first four series (1999–2002); her role as Trina Johnson on EastEnders (2009); and her role as Maggie Cain in the autumn 2009 Doctor Who special, “The Waters of Mars”. More recently, she has played Weyland-Yutaniscientist Albrecht in Alien: Containment (2019), Senator Tynnra Pamlo across the Star Wars franchise, and a version of Professor Moriarty in Enola Holmes 2 (2022).

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