Brian Peter George St John le Baptiste de la Salle Eno, RDI (/ˈiːnoʊ/; born 15 May 1948 and originally christened Brian Peter George Eno) is an English musician, composer, record producer, singer, writer, and visual artist. He is best known for his pioneering work in ambient and electronic music as well as his contributions to rock, worldbeat, chance, and generative music styles. A self-described "non-musician", Eno has advocated a methodology of "theory over practice" throughout his career, and has helped to introduce a variety of unique recording techniques and conceptual approaches into contemporary music. He has been described as one of popular music's most influential and innovative figures.

Born in Suffolk, Eno studied painting and experimental music at art school in the late 1960s before joining glam rock group Roxy Music as synthesizer player in 1971. After recording two albums with the band, he departed in 1973 to record a number of solo albums, ultimately helping to develop ambient music with works such as Another Green World (1975), Discreet Music (1975), and Music for Airports (1978). He took part in frequent collaborations with artists such as Robert Fripp, Cluster, David Bowie on his “Berlin Trilogy”, and David Byrne on 1981's My Life in the Bush of Ghosts. During the 1970s, Eno would also begin a parallel career as a producer, which included work on albums by Talking Heads and Devo, the no wave compilation No New York (1978), and works by avant-garde artists such as John Cale, Jon Hassell, Laraaji, and Harold Budd, among others.

In subsequent decades, Eno continued to record solo albums, collaborate, and produce for other artists, including U2, Coldplay, Laurie Anderson, James, Grace Jones, Slowdive, and James Blake. Dating back to his time as a student, he has also pursued a variety of multimedia projects in parallel with his music career, including sound installations and his mid-70s co-development of Oblique Strategies, a deck of cards featuring cryptic aphorisms intended to break creative blocks and encourage lateral thinking. He continues to release music, produce, and write, and maintains a regular column in Prospect Magazine.