Hearts Under Fire are a British four-piece pop punk band made up of Lexi Clark on drums, Nicky Day on rhythm guitar, Steph Forrow on lead guitar, and Mary O’Regan on vocals and bass. Their music is described as melodic and impassioned, with fast tempos, driving guitars and gang vocals, and it is compared to acts such as Rise Against, Alkaline Trio and AFI.

The band have completed five UK tours and play a live set that places emphasis on pace and heavy guitar work. They perform alongside a range of alternative and rock acts and have shared stages with 65daysofstatic, Gay For Johnny Depp, Get Cape Wear Cape Fly, The Maple State and You Me At Six.

Hearts Under Fire also play Guilfest Rock Sound Stage in 2008.