Here is a list of the best Sigourney Weaver movies to watch on Amazon, Google Play or iTunes.
My favorite ones are "Alien" quadrilogy and "Avatar" dilogy.
Also here are the best movies of all time and genres.If you like movies of specific genre, here are my list of the best action, adventure, animation, biography, comedy, crime, documentary, drama, family, fantasy, history, horror, musical, mystery, romance, sci-fi, sport, thriller, war or western movies.
If you have more time, feel free to check out my other lists of the best dilogy, trilogy, quadrilogy, pentalogy or hexalogy movies.
Or feel free to check out my other movie lists of the best movie directors, actors or actresses.

Avatar
2009 | James Cameron
action adventure fantasy sci-fi
Watch on Amazon, Google Play or iTunes. Also available to buy on Amazon.

Avatar: The Way of Water
2022 | James Cameron
action adventure fantasy sci-fi
Watch on Amazon, Google Play or iTunes. Also available to buy on Amazon.

Alien
1979 | Ridley Scott
horror sci-fi thriller
Watch on Amazon, Google Play or iTunes. Also available to buy separately on Amazon or in a bundle on Amazon, Google Play or iTunes.

Aliens
1986 | James Cameron
action adventure horror sci-fi thriller
Watch on Amazon, Google Play or iTunes. Also available to buy separately on Amazon or in a bundle on Amazon, Google Play or iTunes.

Alien 3
1992 | David Fincher
horror sci-fi
Watch on Amazon, Google Play or iTunes. Also available to buy separately on Amazon or in a bundle on Amazon, Google Play or iTunes.

Alien Resurrection
1997 | Jean-Pierre Jeunet
action horror sci-fi
Watch on Amazon, Google Play or iTunes. Also available to buy separately on Amazon or in a bundle on Amazon, Google Play or iTunes.