Music by Christopher Cerf
Lyrics by Belinda Ward
Date 1996
Publisher Splotched Animal Music Co.
Sesame Street Inc.

"Let the Triangles In" is a Sesame Street song from episode 3569. The song parodies "Let the Sunshine In" from the musical Hair.

Welcoming tons of new members to the Triangle Lover's Club, the Grand High Triangle Lover sings to the crowd, asking them to let triangles into their hearts.