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Watch Science Fiction Movies for Free in 123Movies
Welcome to 123Movies. Watch Science Fiction movies for free in 123movies with official verified HD previews for the most popular and critically acclaimed Science Fiction titles of all time. Futuristic technology, space exploration, time paradoxes, and alien encounters. Explore our curated catalog below with instant streaming.
All Science Fiction Trailers
HD
7.7
Official Trailer
Iron Man
Movie2008
HD
6.8
Official Trailer
The Amazing Spider-Man
Movie2012
HD
7.6
Official Trailer
Sonic the Hedgehog 3
Movie2024
HD
7.2
Official Trailer
The Maze Runner
Movie2014
HD
6.0
Official Trailer
Captain America: Brave New World
Movie2025
HD
8.2
Official Trailer
Star Wars
Movie1977
HD
7.1
Official Trailer
The Substance
Movie2024
HD
6.7
Official Trailer
The Running Man
Movie2025
HD
7.2
Official Trailer
Lilo & Stitch
Movie2025
HD
8.2
Official Trailer
Alien
Movie1979
HD
8.2
Official Trailer
Terminator 2: Judgment Day
Movie1991
HD
7.6
Official Trailer
Arrival
Movie2016
HD
6.5
Official Trailer
Spider-Man 3
Movie2007
HD
7.4
Official Trailer
Spider-Man: Far From Home
Movie2019
HD
7.6
Official Trailer
Thor: Ragnarok
Movie2017
HD
6.6
Official Trailer
28 Years Later
Movie2025
HD
7.8
Official Trailer
Back to the Future Part II
Movie1989
HD
6.4
Official Trailer
Greenland 2: Migration
Movie2026
HD
7.6
Official Trailer
The Fifth Element
Movie1997
HD
7.7
Official Trailer
The Gorge
Movie2025