"Be the One" is a song recorded by English and Albanian singer Dua Lipa for her eponymous debut studio album (2017). The song was written by Lucy Taylor, Jack Tarrant and Digital Farm Animals, with the latter of the three also handling the production. They wrote it about a relationship that Taylor was in and gave the song to Lipa, who was originally reluctant to record it due to the writing credits. It is a dream pop, Europop and synth-pop song with elements of gospel and power pop. Lyrically, it sees Lipa begging her boyfriend for a romantic redemption. The song received acclaim from music critics, with many hailing it as a standout on the album and praising the anthemic qualities in the production.

Released through Dua Lipa Limited for digital download and streaming on 30 October 2015, "Be the One" received limited attention at the time as it was only intended to be promoted on blogs and online outlets. However, after being picked up by German radio stations, it became a sleeper hit the following year. Due to this success, the song was re-released on 6 December 2016, being promoted in the United Kingdom and the United States. It reached the top ten of charts in nine territories worldwide, including the Flanders region of Belgium where it reached the summit and Lipa's native region of the United Kingdom, where it peaked at number nine becoming her first solo top 10 single. The song is currently certified gold or higher in eleven regions, including a double platinum in the UK.

The music video for "Be the One" was directed by Nicole Nodland. It features several scenes of Lipa in London. With the song's re-release, a second music video was released. Directed by Daniel Kaufman, it stars Ansel Elgort as Lipa's love interest and was created in a collaboration between Vevo and Lexus, where a Lexus IS covered in LEDs appears. The video features Elgort following Lipa out of a motel after the two had an argument. Lipa promoted the song with numerous live performances, including ones for Jimmy Kimmel Live!, Good Morning America, and Later... with Jools Holland. Remixes by Paul Woolford, Take a Daytrip and Netsky were also released for promotion.