Imogen Jennifer Heap (; born 9 December 1977) is an English singer-songwriter, sometimes acapella singer, record producer and audio engineer. Born in the London Borough of Havering, Heap became classically trained in piano, cello and clarinet at a young age. She began writing songs at the age of 13 and, while attending boarding school, taught herself both guitar and drums, as well as music production on Atari computers. Heap signed to independent record label Almo Sounds at the age of 18 and later began working with experimental pop band Acacia, alongside Guy Sigsworth, as a frequent guest vocalist.
She released her debut album, an alternative rock record, iMegaphone (1998), again with assistance from Sigsworth working as a producer on the album. However, as funding for Almo Sounds began to decline, Heap was dropped from the label. In the following period while without a label she performed multiple songs for the film G:MT – Greenwich Mean Time, released two singles, and was featured on guitarist Jeff Beck's 2001 album You Had It Coming. In early 2002, Heap and Sigsworth formed the electronic duo Frou Frou, and released their only album to date, Details (2002). The duo broke up in late 2003, though they did reform temporarily to record a cover of the Bonnie Tyler song "Holding Out for a Hero" as part of the Shrek 2 soundtrack.
Heap released two singles in late 2004, "Just for Now" and "Goodnight and Go", the latter of which is her highest charting single on the UK Singles Chart. Heap's second studio album, Speak for Yourself (2005), was released in the United Kingdom on her own label, Megaphonic Records. "Hide and Seek", her most commercially successful single to date, was certified gold by the RIAA and was heavily sampled in Jason Derulo's debut single, "Whatcha Say". Heap's third studio album, Ellipse (2009), was released to mostly positive reviews. This was followed by her fourth studio album, Sparks (2014). In October 2015, Heap revealed her blockchain-based music-sharing program, Mycelia. Heap also composed the music for the West End play, Harry Potter and the Cursed Child, which premiered in the summer of 2016, and which opened on Broadway in April 2018.
As of March 2019, Heap has received two Grammy Awards, one Ivor Novello Award, and one Drama Desk Award.