"All You Need Is Love" is a song by the English rock band the Beatles that was released as a non-album single in July 1967. It was written by John Lennon and credited to Lennon–McCartney. The Beatles performed the song over a pre-recorded backing track as Britain's contribution to Our World, the first live global television link. Watched by over 400 million in 25 countries, the programme was broadcast via satellite on 25 June 1967. The song captured the utopian sentiments of the Summer of Love era and topped singles charts in Britain, the United States and many other countries.

"All You Need Is Love" was later included on the US Magical Mystery Tour album. It also appears in a sequence in the Beatles' 1968 animated film Yellow Submarine and on the accompanying soundtrack album.

For Our World, the Beatles were asked to provide a song with a message that could be easily understood by everyone. The band undertook the assignment at a time when they were committed to two film projects: a planned television special, Magical Mystery Tour; and the animated feature Yellow Submarine, for which they were contractually obliged to United Artists to supply four new recordings. "All You Need Is Love" was selected for Our World for its contemporary social significance over the Paul McCartney-written "Your Mother Should Know". In a statement to Melody Maker magazine, Brian Epstein, the band's manager, said of "All You Need Is Love": "It was an inspired song and they really wanted to give the world a message. The nice thing about it is that it cannot be misinterpreted. It is a clear message saying that love is everything." Lennon later attributed the song's simple lyrical statements to his liking of slogans and television advertising. He also likened the song to a propaganda piece, adding: "I'm a revolutionary artist. My art is dedicated to change." Author Mark Hertsgaard views it as the Beatles' "most political song yet" up to 1967 and the origins of Lennon's posthumous standing as a "humanitarian hero".

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