The article also mentions that Marvin Hamlisch was invited and refused because he didn't want to write ragtime music again after having written "The Entertainer".
But he didn't write it. Scott Joplin did. Hamlisch did an arrangement of the piece for The Sting, but it's still Joplin.
Same thing with the film Ordinary People. The theme music is Pachelbel's Canon, in an arrangement by Hamlisch.
