Instrumental Duet,Piano Instrumental Duet,Piano,Viola,Violin - Level 2 - Digital Download SKU: A0.611712 Composed by Kenny Ascher and Paul Williams. Arranged by Stephen DeCesare. Contemporary,Film/TV. Score and parts. 18 pages. Exultet Music #2852343. Published by Exultet Music (A0.611712). The signature song from the 1979 film: The Muppet Movie, with music and lyrics written by Paul Williams and Kenneth Ascher has now been arranged as a duet for Violin and Viola with an additional Banjo, and Piano accompaniment.