"Undisclosed Desires" (also known as "Undisclosed") is a song by English rock band Muse. It was released as the second single from their fifth studio album, The Resistance, on 16 November 2009. The song was written by lead vocalist Matthew Bellamy, who has described the song as "quite a personal song about me and my girlfriend." The song peaked at number 49 on the UK Singles Chart. It has also achieved large success in Australia where it as since been certified Platinum and is Muse's highest charting single in that country.

In an interview with English music magazine Mojo, writer Matthew Bellamy described "Undisclosed Desires" as one of "some tracks [...] that really take an influence from contemporary R&B, and a little bit from the David Bowie Song "Ashes to Ashes" – heavy beats, syncopation, very melodic, rhythmic vocals," adding that "Dom [Howard, Muse drummer] has done all the drum programming. [...] It's the first song we've had where I don't play guitar or piano."NME added, on the topic of the lack of guitar and piano, that "the song [is] built around electric drum patterns and some slap bass from Chris Wolstenholme." Speaking about his slap bass contribution, Wolstenholme joked that "it's probably not ever been cool to play slap bass, [...] but on that song it just seemed to work so we kept it in." When played live, Bellamy plays a keytar. Music magazine Q describe the song as having a "minimal and dance-y feel." In the interview with Q, Bellamy also revealed the inspiration behind the song's lyrics, explaining that "it's actually quite a personal song about me and my girlfriend. I'm thinking people have had enough of geo-political stuff by the end of the album." The style of the song has been compared to that of new wave band Depeche Mode, including their song "New Life".

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