"Boyfriend" is a song written and recorded by Canadian musical duo Tegan and Sara for their eighth studio album, Love You to Death (2016). The twins co-wrote the track with its producer, Greg Kurstin, who had previously worked with them on the majority of their breakthrough album, Heartthrob (2013). Released to digital retailers April 8, 2016 through Vapor Records and Warner Bros. Records, "Boyfriend" serves as the album's lead single and their first non-soundtrack single in nearly three years.

Upon its release, "Boyfriend" was met with generally positive reviews and moderate commercial reception. In the duo's native Canada, the song entered the Billboard Canadian Hot 100 at number 92 and has impacted multiple national airplay charts.

After a three-year gap since the release of their more commercial, pop-oriented album, Heartthrob (2013), Tegan and Sara announced their then-upcoming eighth studio album, Love You to Death, in March 2016. They reconnected with Greg Kurstin, who produced over half of the former (including all four of its official and promotional singles), for the entirety of the new album. "Boyfriend" was selected as the album's lead single and the duo released a teaser video to YouTube on March 30, 2016.

The song premiered in full through Beats 1 radio on April 7, 2016; it was then made available to download the following day (April 8, 2016). Official remixes were commissioned by the duo's record label, Warner Bros. Records, in May and the resulting remix extended play was released on May 27, 2016. "Boyfriend" is scheduled to impact American hot adult contemporary and AC radio formats on June 6, 2016.

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