Stream of Passion is a Dutch progressive metal band with symphonic and gothic influences founded by guitarist and composer Arjen Anthony Lucassen and Mexican singer, violinist, and lyricist Marcela Bovio. They have released four studio albums.

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.