Jacob Collier (born 2 August 1994) is an English singer, arranger, composer, producer, and multi-instrumentalist based in London, England. In 2012, his split-screen video covers of popular songs, such as Stevie Wonder's "Don't You Worry 'bout a Thing", began to go viral on YouTube

Collier's style fuses elements of jazz, a cappella, groove, folk, electronic music, classical music, gospel, soul and improvisation, and often features extreme use of reharmonisation. In 2014, Collier signed to Quincy Jones' management company and began working on his one-man, audio-visual live performance vehicle, designed and built at MIT in Cambridge, Ma.

In 2016, Collier released his debut album, In My Room, which was entirely self-recorded, arranged, performed and produced in the small back room of his family home in Finchley, north London. In 2017, Collier was awarded two Grammys for his arrangements of "Flintstones" and "You And I", both from the album.

In 2018, Collier began working on Djesse, a four-volume, 50-song album featuring more than two dozen artists and ensembles. The first album, Djesse Vol. 1, was released in December 2018; and the second, Djesse Vol. 2, was released in July 2019. As of December 2019, the first half of the project has led to two more Grammy nominations: Jacob's arrangements of "All Night Long" on Djesse Vol. 1 and "Moon River" on Djesse Vol. 2 are both nominated