Kermit performed the hit singles "Bein' Green" in 1970 and "Rainbow Connection" in 1979 for "The Muppet Movie", the first feature-length film featuring the Muppets. Kermit’s original performance of "Rainbow Connection" reached No. 25 on the "Billboard" Hot 100 and was added to the Library of Congress’s National Recording Registry in 2021. Kermit's iconic look and voice have been recognizable in popular culture worldwide since, and in 2006, the character was credited as the author of "Before You Leap: A Frog's Eye View of Life's Greatest Lessons", an "autobiography" told from the perspective of the character himself.