"Let 'Em In" was the second single from the Wings' 1976 album Wings at the Speed of Sound. It was written and sung by Paul McCartney and reached the top 3 in both the US and UK: It was a #2 hit in the UK, and in the US it was a #3 pop hit and #1 easy listening hit . In Canada, the song was #3 for three weeks on the pop chart and #1 for three weeks on the MOR chart of RPM Magazine.
The lyrics include references to a list of McCartney's friends and relatives: "Sister Suzy, Brother John, Martin Luther, Phil and Don, Brother Michael, Auntie Gin, Open the door and let 'em [them] in." In the second verse, "Brother Michael" is replaced by "Uncle Ernie," and in the third, "Auntie Gin" is replaced by "Uncle Ian."
The song is noted for its fading to a lower volume, towards the end of the song, and then suddenly, ending the song on two louder chords.