Charlie Ernst is a composer and musician (usually keyboards) who wrote or co-wrote multiple songs for Sesame Street, usually for film segments produced by Mustapha Khan (and often including Khan's lyrics).
As a musician, Ernst accompanied Grover Washington, Nancy Wilson, and noted saxophonist Gerry Mulligan. With Ken Pollock, he produced the song "This Is Love" for the soundtrack to House Party (starring Kid 'n Play). He wrote cues for Wild TV. Ernst currently teaches music and serves as jazz band director at Hightstown High School in New Jersey.
- "Dancin' Shoes" (with Mustapha Khan, Ken Pollock, Kenny Vaughan)
- "Dirty Diaper Blues" (with Khan; Elmo's Potty Time)
- "Hot in the City" (with Pollock, Christopher Cerf, Vaughan)