Ayreon Universe – The Best of Ayreon Live, alternatively known as Ayreon Universe – Best of Ayreon Live or simply Ayreon Universe, is a live album and DVD/Blu-ray by Arjen Anthony Lucassen's progressive rock/metal rock opera project Ayreon, released on 30 March 2018. Unlike Ayreon's first live album The Theater Equation, which was a stage performance of the album The Human Equation, Ayreon Universe was performed as a traditional concert, with two additional songs from Star One, another project by Lucassen. It was recorded during a series of concerts in September 2017, which were the first ever official Ayreon concerts, although The Theater Equation was released as an official Ayreon product.

Arjen Anthony Lucassen is a Dutch singer, songwriter, multi-instrumentalist musician and record producer best known for his long-running progressive metal/rock opera project Ayreon. Lucassen started his career in 1980 as the guitarist and backing vocalist of Dutch band Bodine as Iron Anthony, before joining Vengeance in 1984. After eight years he left the band, wanting to go into a more progressive direction, and released two years later an unsuccessful solo album entitled Pools of Sorrow, Waves of Joy under the nickname Anthony.