"Aliens" is a 1986 science fiction action movie directed by James Cameron and starring Sigourney Weaver in the lead role. The film is a sequel to the 1979 movie "Alien" and follows the story of Ellen Ripley, who is awakened from her cryogenic sleep 57 years after the events of the first movie to join a team of Marines on a mission to investigate the sudden loss of contact with a colony on a remote planet.

Upon arriving at the colony, Ripley and the Marines discover that the colonists have been killed by the creatures known as "Xenomorphs", the same extraterrestrial species encountered by Ripley in the first movie. The team becomes trapped and outnumbered by the aliens, and Ripley must use her experience and knowledge to try to survive and protect the remaining team members.

The movie features intense action sequences and thrilling suspense as Ripley and the Marines battle the Xenomorphs in a series of brutal encounters. The film also introduces new types of Xenomorphs, such as the "Queen Alien", and explores the relationship between Ripley and a young girl named Newt, who is the sole survivor of the colony.

"Aliens" was widely acclaimed upon its release and has since become a classic of the science fiction genre. The film won two Academy Awards for Best Sound Effects Editing and Best Visual Effects, and is often regarded as one of the best sequels ever made. It is also known for its iconic moments and quotes, such as Ripley's line "Get away from her, you b***h!" during her final confrontation with the Queen Alien.

Overall, "Aliens" is a thrilling and intense sci-fi action movie, with a strong and memorable lead performance by Sigourney Weaver as Ellen Ripley, who has become an iconic character in the genre. The movie has had a significant influence on the sci-fi and action genres, and remains a beloved classic to this day.