Halcyon is the second studio album by English recording artist Ellie Goulding, released on 5 October 2012 by Polydor Records. It was recorded between 2011 and 2012, during promotion of her debut album Lights (2010). The album sees Goulding working with several producers, including Jim Eliot, Starsmith, Billboard, Justin Parker, MONSTA, Madeon and Mike Spencer, as well as collaborations with artists such as Tinie Tempah and Calvin Harris.
On 26 August 2013, the album was re-released as an expanded version titled Halcyon Days.