Cecilia (Simon & Garfunkel song)

"Cecilia" is a song by American musical duo Simon & Garfunkel. It was released in April 1970 as the third single from the duo's fifth and final studio album, Bridge over Troubled Water (1970). Written by Paul Simon, the song's origins lie in a late-night party, in which the duo and friends began banging on a piano bench. They recorded the sound with a tape recorder, employing reverb and matching the rhythm created by the machine. Simon later wrote the song's guitar line and lyrics on the subject of an untrustworthy lover.

"Cecilia" was a hit single in the United States, peaking at number four on the Billboard Hot 100. On the Cash Box Top 100, it reached number one. The song also performed well in several other countries but failed to chart in the United Kingdom, where it was released as a single about six months after the album. It has been the subject of numerous cover versions, including those by American duo Times Two and English singer Suggs, which became chart hits in numerous regions.