"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, a #2 hit in the UK and a #3 hit in the US. In Canada the song was #3 for 3 weeks on the pop charts and #1 for 3 weeks on the MOR charts 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.