"If This World Were Mine" is a 1967 song by soul duo Marvin Gaye and Tammi Terrell from their album United. Written solely by Gaye, it was one of the few songs they recorded without Ashford & Simpson writing or producing. When it was released as a single in November 1967 as the B-side to the duo's "If I Could Build My Whole World Around You", it hit the Billboardpop singles chart, peaking at number 68, and peaked at number 27 on the BillboardR&B singles chart. Gaye would later put the song into his set list during his last tours in the early 1980s as he performed a medley of his hits with Terrell.
In November 2024, Kendrick Lamar and SZA sampled Vandross's rendition of the song called "Luther" dedicated to the late singer. The song went number one on the Billboard Hot 100 in March of 2025.
