This Old Heart of Mine is the fourth studio album released by The Isley Brothers in 1966, on the Tamla (Motown) label. The album, their first with the seminal Detroit-based music label, yielded the Isleys' biggest hit in their early period with the title track, "This Old Heart of Mine (Is Weak for You)". Other charted singles including "Take Some Time Out for Love" and "I Guess I'll Always Love You".
Despite the early success of their Motown debut, the Isley Brothers would be alienated from the label because it treated them as a second-string group. They soon left for Buddah Records and reforming their own T-Neck label in 1969, finding long-lasting success soon afterwards.
The album cover featuring white models was satirized in a scene from the 1991 film The Five Heartbeats, a musical drama chronicling the career of a fictional rhythm and blues vocal group.
All tracks are written by Holland-Dozier-Holland, except where noted