Morty the Musical Muse is a muse character seen in the Sesame Street segment Abby's Flying Fairy School.

He always speaks in rhyme and teaches Abby, Gonnigan, and Blögg how to play their instruments the "easy" way. He presents them with three challenges, and in the process, they learn about musical terms such as "pitch", "tempo", and "dynamics."

His model is the same as Art Fishbottom, but with different-colored fur and facial features.