There are a total of nine Alien movies in the Alien franchise. These include the original mainline series, two Predator crossover films, and prequels. The nine films are:

1. Alien (1979)
2. Aliens (1986)
3. Alien 3 (1992)
4. Alien Resurrection (1997)
5. Alien vs Predator (2004)
6. Aliens vs Predator: Requiem (2007)
7. Prometheus (2012)
8. Alien: Covenant (2017)
9. Alien: Romulus (2024)

Additionally, there is a TV series as part of the franchise. The newest movie released was Alien: Romulus in August 2024.