"Omen" is a song by English electronic music duo Disclosure. It features 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), with the acoustic version being released on the deluxe/drowning shadows edition of Smith's debut album In the Lonely Hour (2014). 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.
A music video of the track was released on 27 July 2015. It was the second part of a three-part series, preceded by "Holding On" and followed by "Jaded". The video was filmed at the Teatro Fru Fru in Mexico City.