Not counting sol, our sun, the nearest star is Proxima Centauri, 4.39 light years away, part of the Alpha Centauri system.
Alpha Centauri (α Cen / α Centauri) is the brightest star in the southern constellation of Centaurus. Although it appears as a single point to the naked eye, Alpha Centauri is actually a system of three stars, one of which is the fourth brightest star in the night sky. Alpha Centauri is famous in the Southern Hemisphere as the outermost “pointer” to the Southern Cross, but it is too far south to be visible in most of the northern hemisphere. The two brightest components of the system are too close to be resolved as separate stars by the naked eye and so are perceived as a single source of light with a total visual magnitude of about −0.27 (brighter than the third brightest star in the night sky, Arcturus).
Alpha Centauri is the closest star system beyond our own solar system, being 4.39 light-years distant (about 25.8 trillion miles or 277,600 AU) (Proxima Centauri, often regarded as part of the system, is 4.26 light-years distant). This makes it a logical choice as "first port of call" for speculative fiction about space travel, which often assumes eventual human exploration of the system or even colonization of possible planets within it. Such themes are found in said speculative works of fiction such as novels and video games.