"All of My Heart" is a song by the British synthpop group ABC from their album The Lexicon of Love. It was released as a single in the UK on 27 August 1982 and peaked at number five in the UK Singles Chart. It was written by lead singer Martin Fry and released by Neutron Records. The B-side, "Overture", was an instrumental, orchestral medley of songs from The Lexicon of Love, arranged by Anne Dudley.
In a retrospective review of the song, Allmusic journalist Mike DeGagne wrote: "The lushness of the instruments and the small amounts of musical detail drape the body of the track, adding a slight classical feel to the song's flow."
In 2005, Jess Harvell of Pitchfork Media listed "All of My Heart" as his favorite UK song of the post-punk "New pop" era, describing it as "ABC's slickest and most gorgeous single, and yet also possibly their most bitter." Harvell wrote: "Martin Fry alternates between open hearted and suspicious, warm and resentful with the turn of a phrase. The outro–a swirl of soundtrack strings, plucked bass, and cascading piano–is the most purely beautiful music of the era."