"How Deep Is Your Love" is a pop ballad written and recorded by the Bee Gees in 1977 and released as a single in September of that year.

It was ultimately used as part of the soundtrack to the film Saturday Night Fever.

The song was a #3 hit in the United Kingdom and Australia. In the United States, it topped the Billboard Hot 100 on December 25, 1977 (becoming the first of six consecutive US number-one hits), ending the 10-week reign of Debby Boone's "You Light Up My Life" and stayed in the Top 10 for a then-record 17 weeks. The single spent six weeks atop the US adult contemporary chart.

It was originally intended for Yvonne Elliman, but she later recorded "If I Can't Have You" instead. During the Bee Gees' 2001 Billboard magazine interview, Barry reportedly said that "How Deep Is Your Love" was his favorite Bee Gees song.

The song has been ranked #25 on Billboard's All-Time chart spanning sixty years of music; (1958-2018).

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