"R U Mine?" is a song by the English indie rock band Arctic Monkeys. It features lyrics written by Arctic Monkeys vocalist and rhythm guitarist Alex Turner and bassist Nick O'Malley, as well as music composed by the entire band. The song was released as a digital download in the United Kingdom on 26 February 2012 and was released physically for the Record Store Day on 21 April 2012 on a limited edition double A-side purple 7" vinyl along with new song "Electricity". The vinyl was limited to a run of only 1750 copies.

"R U Mine?" debuted at number twenty-three on the UK Singles Chart; the band's highest charting single since "Crying Lightning" reached number twelve in July 2009. Despite originally being released as a standalone single, the song was later included on their fifth studio album, AM (2013), in a slightly different version. It was later certified gold in the UK, making one of the Arctic Monkey's best-selling songs.

The song was also featured in the video games Forza Horizon and Rocksmith 2014. It was also featured in the videogame Guitar Hero Live. It was released as a downloadable song for the rhythm game Rock Band 3 on January 13, 2015; one of the first three downloadable songs released for Rock Band 3 in almost two years.

Alex Turner said that the band drew inspiration from recent relationships, saying "There's a few references for people to pick up on in there – 'Some Velvet Morning', Tracy Island. That particular bit is like the thing Lil Wayne and Drake do. We've been listening to a lot of their stuff recently. I like that thing they do where they talk about something backwards, so they talk about it but then say what it actually is on the next line. It's hard to explain but I guess it's a little nod to that idea. So I say, 'I'm a puppet on a string', just before mentioning Tracy Island. That's what it's about – uncertainty."

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