Star One (also referred to as Arjen Anthony Lucassen's Star One) is a Dutch progressive metal supergroup/side-project of Arjen Anthony Lucassen of Ayreon fame.

Unlike Ayreon, albums don't follow one storyline; instead, each song is a different story with a sci-fi concept, most of the tracks based on existing movies and series. The band takes its name from the second season finale of Blake's 7. The band includes four singers alternating in all the songs, not including Lucassen, who sings occasionally, plays all guitars and keyboards and is writing and composing all the songs.