"Deirdre" is a song by the American rock band the Beach Boys from their 1970 album Sunflower.

The song was released by CBS in the UK as a single in 1977 (with "Thank You Baby" – also from the album – on the B-side) but although it got some airplay, it never charted.

[2][3] Biographer Timothy White described the song as "a stroll-tempo devotional to an idealized, red-haired goddess; its stippled use of flutes plus the spacey filtering and compression techniques in the vocal mixes giving the track a celestial grandeur.

"[4] In an undated interview with the New Musical Express, Johnston credited Brian with only contributing four lines to the lyrics to "Deirdre".

"[10] Later in the 1970s, after he had launched a solo career, Johnston said in an interview that he regretted recording the song as a track by the Beach Boys.