Episode IV – A New Hope (1977) In one movie rife with aliens, robots, and spaceships, words like Wookiee, Jedi, and lightsaber became household names, and the Star Wars universe took the world by storm. The timeline follows exactly where Rogue One left off, but in some ways this is really where Star Wars begins.

https://www.nme.com/blogs/the-movies-blog/star-wars-movie-viewing-order-chronology-2322718