films The Greatest Sci-Fi Movies of All Time

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List Rules Which science fiction films are the best? Vote up your favorites and add any that aren't already on the list.

What are the greatest sci-fi movies of all time? Science fiction films are among the most popular movies in cinematic history, with films like Star Wars and Aliens keeping audiences on the edge of their collective seats for decades. This list includes these classics, and many more, but it is by no means complete. Feel free to add your favorite sci-fi movies if they aren't listed, and vote for your favorites.

Want to see more of the best Sci-Fi? Here are the Best Sci-Fi TV Shows of All Time

Great sci-fi films include stories of extraterrestrial life, time travel, space travel, robots and more. Some of these amazing science fiction movies are more fantasy-oriented, while others are a bit closer to reality. Either way, scifi films keep audiences rapt with tales of science and technology, combined, at times with the supernatural.

Some sci-fi films are based on classic novels or short stories by such heavyweight authors as H.G. Wells (War of the WorldsThe Invisible Man) or Philip K. Dick (Blade RunnerMinority Report).

What are the greatest sci fi movies of all time? This list of the best sci-fi films is also Crowdranked, meaning you can rerank your own greatest sci-fi movies. Your reranks can change the overall order of the films on the list!

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Star Wars is listed (or ranked) 1 on the list The Greatest Sci-Fi Movies of All Time
Star Wars Harrison Ford, Carrie Fisher Mark Hamill

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Star Wars Episode V: The Empir... is listed (or ranked) 2 on the list The Greatest Sci-Fi Movies of All Time
Star Wars Episode V: The Empire Strikes Back Harrison Ford, Carrie Fisher Mark Hamill

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Alien is listed (or ranked) 3 on the list The Greatest Sci-Fi Movies of All Time
Alien Sigourney Weaver, John Hurt Ian Holm

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Terminator 2: Judgment Day is listed (or ranked) 4 on the list The Greatest Sci-Fi Movies of All Time
Terminator 2: Judgment Day Arnold Schwarzenegger, Edward Furlong Linda Hamilton

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The Matrix is listed (or ranked) 5 on the list The Greatest Sci-Fi Movies of All Time
The Matrix Keanu Reeves, Hugo Weaving Carrie-Anne Moss

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Blade Runner is listed (or ranked) 6 on the list The Greatest Sci-Fi Movies of All Time
Blade Runner Harrison Ford, Daryl Hannah Sean Young

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Back to the Future is listed (or ranked) 7 on the list The Greatest Sci-Fi Movies of All Time
Back to the Future Michael J. Fox, Christopher Lloyd Lea Thompson

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The Terminator is listed (or ranked) 8 on the list The Greatest Sci-Fi Movies of All Time
The Terminator Arnold Schwarzenegger, Bill Paxton Linda Hamilton

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Return of the Jedi is listed (or ranked) 9 on the list The Greatest Sci-Fi Movies of All Time
Return of the Jedi Harrison Ford, Carrie Fisher Mark Hamill

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2001: A Space Odyssey is listed (or ranked) 10 on the list The Greatest Sci-Fi Movies of All Time
2001: A Space Odyssey Arthur C. Clarke, Leonard Rossiter Ed Bishop

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Aliens is listed (or ranked) 11 on the list The Greatest Sci-Fi Movies of All Time
Aliens Sigourney Weaver, Bill Paxton Michael Biehn

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Jurassic Park is listed (or ranked) 12 on the list The Greatest Sci-Fi Movies of All Time
Jurassic Park Samuel L. Jackson, Jeff Goldblum Richard Attenborough

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E.T. the Extra-Terrestrial is listed (or ranked) 13 on the list The Greatest Sci-Fi Movies of All Time
E.T. the Extra-Terrestrial Drew Barrymore, Erika Eleniak Debra Winger

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Close Encounters of the Third ... is listed (or ranked) 14 on the list The Greatest Sci-Fi Movies of All Time
Close Encounters of the Third Kind Richard Dreyfuss, Teri Garr Carl Weathers

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Planet of the Apes is listed (or ranked) 15 on the list The Greatest Sci-Fi Movies of All Time
Planet of the Apes Charlton Heston, Linda Harrison James Whitmore

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Star Trek II: The Wrath of Kha... is listed (or ranked) 16 on the list The Greatest Sci-Fi Movies of All Time
Star Trek II: The Wrath of Khan Kirstie Alley, William Shatner Leonard Nimoy

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The Fifth Element is listed (or ranked) 17 on the list The Greatest Sci-Fi Movies of All Time
The Fifth Element Milla Jovovich, Bruce Willis Gary Oldman

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Total Recall is listed (or ranked) 18 on the list The Greatest Sci-Fi Movies of All Time
Total Recall Arnold Schwarzenegger, Sharon Stone Michael Ironside

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Ghostbusters is listed (or ranked) 19 on the list The Greatest Sci-Fi Movies of All Time
Ghostbusters Bill Murray, Sigourney Weaver Dan Aykroyd

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Predator is listed (or ranked) 20 on the list The Greatest Sci-Fi Movies of All Time
Predator Arnold Schwarzenegger, Jesse Ventura Carl Weathers

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Star Trek is listed (or ranked) 21 on the list The Greatest Sci-Fi Movies of All Time
Star Trek Zoe Saldana, Jennifer Morrison Winona Ryder

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Inception is listed (or ranked) 22 on the list The Greatest Sci-Fi Movies of All Time
Inception Leonardo DiCaprio, Tom Hardy Marion Cotillard

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Independence Day is listed (or ranked) 23 on the list The Greatest Sci-Fi Movies of All Time
Independence Day Will Smith, Jeff Goldblum Vivica A. Fox

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12 Monkeys is listed (or ranked) 24 on the list The Greatest Sci-Fi Movies of All Time
12 Monkeys Brad Pitt, Bruce Willis Christopher Plummer

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Stargate is listed (or ranked) 25 on the list The Greatest Sci-Fi Movies of All Time
Stargate Kurt Russell, James Spader Djimon Hounsou

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Back to the Future Part II is listed (or ranked) 26 on the list The Greatest Sci-Fi Movies of All Time
Back to the Future Part II Clint Eastwood, Michael J. Fox Elisabeth Shue

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Guardians of the Galaxy is listed (or ranked) 27 on the list The Greatest Sci-Fi Movies of All Time
Guardians of the Galaxy Zoe Saldana, Bradley Cooper Karen Gillan

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WALL-E is listed (or ranked) 28 on the list The Greatest Sci-Fi Movies of All Time
WALL-E Sigourney Weaver, Laraine Newman Kathy Najimy

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Minority Report is listed (or ranked) 29 on the list The Greatest Sci-Fi Movies of All Time
Minority Report Cameron Diaz, Tom Cruise Colin Farrell

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Avatar is listed (or ranked) 30 on the list The Greatest Sci-Fi Movies of All Time
Avatar Zoe Saldana, Sigourney Weaver Michelle Rodriguez

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The Thing is listed (or ranked) 31 on the list The Greatest Sci-Fi Movies of All Time
The Thing Kurt Russell, Keith David John Carpenter

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Men in Black is listed (or ranked) 32 on the list The Greatest Sci-Fi Movies of All Time
Men in Black Will Smith, Sylvester Stallone Steven Spielberg

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Serenity is listed (or ranked) 33 on the list The Greatest Sci-Fi Movies of All Time
Serenity Summer Glau, Morena Baccarin Nathan Fillion

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The Time Machine is listed (or ranked) 34 on the list The Greatest Sci-Fi Movies of All Time
The Time Machine Yvette Mimieux, Rod Taylor Alan Young

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Starship Troopers is listed (or ranked) 35 on the list The Greatest Sci-Fi Movies of All Time
Starship Troopers Neil Patrick Harris, Denise Richards Amy Smart

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Mad Max 2 is listed (or ranked) 36 on the list The Greatest Sci-Fi Movies of All Time
Mad Max 2 Mel Gibson, Bruce Spence Vernon Wells

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The Day the Earth Stood Still is listed (or ranked) 37 on the list The Greatest Sci-Fi Movies of All Time
The Day the Earth Stood Still Patricia Neal, Michael Rennie Frances Bavier

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District 9 is listed (or ranked) 38 on the list The Greatest Sci-Fi Movies of All Time
District 9 Sharlto Copley, Jed Brophy Vanessa Haywood

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RoboCop is listed (or ranked) 39 on the list The Greatest Sci-Fi Movies of All Time
RoboCop Alex Van Halen, Peter Weller Leeza Gibbons

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Galaxy Quest is listed (or ranked) 40 on the list The Greatest Sci-Fi Movies of All Time
Galaxy Quest Sigourney Weaver, Alan Rickman Tim Allen

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A Clockwork Orange is listed (or ranked) 41 on the list The Greatest Sci-Fi Movies of All Time
A Clockwork Orange Malcolm McDowell, Warren Clarke Steven Berkoff

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Indiana Jones and the Last Cru... is listed (or ranked) 42 on the list The Greatest Sci-Fi Movies of All Time
Indiana Jones and the Last Crusade Harrison Ford, Sean Connery River Phoenix

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The Abyss is listed (or ranked) 43 on the list The Greatest Sci-Fi Movies of All Time
The Abyss Ed Harris, Mary Elizabeth Mastrantonio Chris Elliott

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Apollo 13 is listed (or ranked) 44 on the list The Greatest Sci-Fi Movies of All Time
Apollo 13 Tom Hanks, Bryce Dallas Howard Ed Harris

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Contact is listed (or ranked) 45 on the list The Greatest Sci-Fi Movies of All Time
Contact Matthew McConaughey, Jodie Foster Jay Leno

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Spaceballs is listed (or ranked) 46 on the list The Greatest Sci-Fi Movies of All Time
Spaceballs Joan Rivers, John Hurt Mel Brooks

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Star Trek IV: The Voyage Home is listed (or ranked) 47 on the list The Greatest Sci-Fi Movies of All Time
Star Trek IV: The Voyage Home William Shatner, Leonard Nimoy George Takei

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I, Robot is listed (or ranked) 48 on the list The Greatest Sci-Fi Movies of All Time
I, Robot Will Smith, Shia LaBeouf Bridget Moynahan

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Mad Max is listed (or ranked) 49 on the list The Greatest Sci-Fi Movies of All Time
Mad Max Mel Gibson, Hugh Keays-Byrne Steve Bisley

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Star Trek: First Contact is listed (or ranked) 50 on the list The Greatest Sci-Fi Movies of All Time
Star Trek: First Contact Patrick Stewart, James Cromwell Alfre Woodard