"All of My Heart" is a song by the English new wave band ABC, from their debut studio album, The Lexicon of Love (1982). It was released as a single in the UK on 27 August 1982 and peaked at No. 5 on the UK Singles Chart. 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 critic 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 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."

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