"I Guess I'll Always Love You" is a 1966 single by The Isley Brothers, released on Motown's Tamla label, and is a Holland–Dozier–Holland composition. In the US, the single made both the Hot 100, and R&B singles chart.
The Isleys' version went to number 45 in the United Kingdom, when originally released in September 1966 (TMG 572) and was then reissued again in 1969 (TMG 683) peaking at number 11, a much bigger hit than it ever was in the United States.
Chronology(The band's name history: The Primettes 1959–1961 / The Supremes 1961–1967 / Diana Ross & The Supremes 1967–1970 / The Supremes 1970 / Diana Ross & The Supremes 1970 / The Supremes 1970–)