Mary Sean Young (born November 20, 1959) is an American actress who is known for her film performances, particularly those in the sci-fi genre. Young's early roles include the independent romance Jane Austen in Manhattan (1980) and the comedy feature Stripes (1981), the latter being a commercial success. Her breakthrough role was that of Rachael in the sci-fi Blade Runner (1982), which emerged as a significant work in popular culture; she reprised the role for Blade Runner's acclaimed sequel Blade Runner 2049 (2017). She originated the character of Chani in the sci-fi Dune (1984), led the neo-noir No Way Out (1987), played Kate in Wall Street (1987), and had starring roles in the comedies Fatal Instinct (1993) and Ace Ventura: Pet Detective (1994).