Leslie Dilley was a Welsh art director and production designer. During his film career from the 1970s to 2000s, he won the Academy Award for Best Art Direction twice for Star Wars Episode IV - A New Hope (1977) and Raiders of the Lost Ark (1981), sharing this both times with Norman Reynolds. Dilley received additional Best Art Direction nominations for Alien (1979), The Empire Strikes Back (1980), and The Abyss (1989). Apart from art direction, Dilley was a production designer for The Exorcist III (1990), Casper (1995), and Deep Impact (1998).