Gemma Jackson (born 1951) is a British production designer and art director. She has spent the bulk of her career in film, having worked on films such as A Far Off Place, The Borrowers, Bridget Jones’s Diary, and Finding Neverland, for which she was nominated for an Oscar. More recently she won an Emmy for her work on the HBO miniseries John Adams.
Jackson was the lead Production Designer on Game of Thrones for Season 1, Season 2, and Season 3]]. She was faced with the difficult task of physically realizing the small details of the locations in George R.R. Martin's A Song of Ice and Fire novels. Jackson was responsible for designing, building, and dressing the actual physical sets that need to be used in filming the series.
Gemma Jackson left working on Game of Thrones after Season 3. No official statement has yet been made explaining the circumstances of her departure. She was replaced as lead Production Designer for Season 4 by Deborah Riley.