11. Weaver’s Academy Award nomination for Aliens was important for a few reasons. From writer Trace Thurman:
The significance of Weaver’s nomination should be obvious. Not since The Exorcist had any horror film landed a major acting nomination at the Academy Awards. The only real win for the genre was Ruth Gordon’s Best Supporting Actress win in 1964 for Rosemary’s Baby. It is also considered the first acting nomination for an action film, a genre that is typically overlooked by the Academy.
12. The alien screams in Aliens were baboon shrieks.
13. To bring the giant alien queen to life in Aliens required nearly 20 operators.
14. Al Matthews, who plays a Marine sergeant in Aliens, was (in real life) the first black Marine in the 1st Marine Division in Vietnam to be meritoriously promoted to the rank of sergeant.
15. A lot of the sets in Aliens weren’t exactly what they seemed. From IMDb:
When Fox execs saw an early cut of the film, they complained to producer Gale Anne Hurd that it looked like the money had all been spent on sets rather than special effects. Hurd took great delight in telling the execs that a majority of the sets that they were seeing in the film were indeed miniatures or optical effects (eg, special effects). The artists behind these images were very pleased that their work had fooled the money men.