"Sunflower" is a song by American indie pop band Vampire Weekend featuring singer and guitarist Steve Lacy. It was the second single from their fourth studio album Father of the Bride, and was released on March 6, 2019 by Columbia Records as a double A-side with "Big Blue". In response to Post Malone and Swae Lee's identically-titled single, the band covered the song as a part of their BBC Live Lounge session.

Steve Thomas Lacy-Moya is an American singer-songwriter, guitarist, and record producer. He gained recognition as the guitarist of the alternative R&B band the Internet, which he joined in 2015. His self-produced debut EP, Steve Lacy's Demo (2017), was met with critical praise and became a sleeper hit. Lacy then guest performed alongside Frank Ocean on Tyler, the Creator's 2017 single "911 / Mr. Lonely", which received double platinum certification by the Recording Industry Association of America (RIAA). That year, he also co-wrote songs for artists including Solange Knowles, Chloe x Halle, and Kendrick Lamar—on his song "Pride".