"One Two Brown Eyes" is a song written by Van Morrison, originally recorded by his group Them in 1964. After leaving an Irish showband, Morrison returned to his hometown of Belfast, where he joined up with guitarist Billy Harrison, bassist Alan Henderson and keyboardist Eric Wrixon and formed the band that would eventually become Them. "One Two Brown Eyes" most likely originated during jam sessions at the Maritime Hotel where Them had a residency. After featuring it on a demo, Them were signed to Decca Records by Dick Rowe who also produced the studio recording of it on 5 May 1964.

The Angry Young Them is the first album by the Northern Irish rock and roll group Them, whose lead singer and songwriter was Van Morrison. The album was released in the UK in June 1965. In the U.S., the album was released as Them with partly different tracks.