Joseph Guilherme Raposo Jr., OIH (February 8, 1937 – February 5, 1989) was a Portuguese-American composer, songwriter, pianist, television writer and lyricist, best known for his work on the children's television series Sesame Street, for which he wrote the theme song, as well as classic songs such as "Bein' Green" and "C is for Cookie". He also wrote music for television shows such as The Electric Company, Shining Time Station and the sitcom Three's Company, including its theme song. In addition to these works, Raposo also composed extensively for the Dr. Seuss productions Halloween Is Grinch Night, Pontoffel Pock, Where Are You? and The Grinch Grinches the Cat in the Hat.
Raposo was born in Fall River, Massachusetts, the only child of Portuguese immigrant parents Joseph Soares Raposo and Maria da Ascenção Vitorino Raposo. He was a graduate of Harvard College, class of 1958, where he was well known for writing the scores for several Hasty Pudding shows.
Raposo worked in musical theater both before and after his work for The Children's Television Workshop and Sesame Street; musical theater was where he first encountered future.