"Omen" is a song by English electronic music duo Disclosure. It features the vocals from English singer Sam Smith. It was released as a digital download on 27 July 2015, by Island Records. It is the second single from Disclosure's second studio album, Caracal (2015), following "Holding On". It was written by Guy Lawrence, Howard Lawrence and Smith and co-written by Jimmy Napes. It is the second collaboration between Smith and Disclosure, following "Latch" in 2012. The song charted in multiple countries and is featured on the soundtrack for the video game, FIFA 16.

Disclosure are an English electronic music duo consisting of brothers Howard and Guy Lawrence. They grew up in Reigate, Surrey. Their debut studio album, Settle, released on 3 June 2013, by PMR Records, was nominated for Best Dance/Electronica Album at the 2014 Grammy Awards. They released a second studio album, Caracal, on 25 September 2015 which was also nominated for Best Dance/Electronic Album at the 2016 Grammy Awards. Their third studio album, Energy, was released on 28 August 2020, and was nominated for Best Dance/Electronic Album at the 2021 Grammy Awards, alongside the fourth single from the album, "My High", which was nominated for Best Dance Recording.