Written by George Weiss and Bob Thiele
Date 1967
Publisher Abilene Music Inc.
Quartet Music
Range Road Music Inc.

What a Wonderful World was sung by Rowlf the Dog to a live dog in episode 201 of The Muppet Show. Near the end of the song, the lyric "I hear babies cry" was appropriately modified to "I hear puppies cry".

A similar segment had Link Hogthrob sing Sonny Boy to a live pig in Episode 215.

Elmo sang the song with Andy Grammer at the 2017 Annual Sesame Workshop Benefit Gala.