Hoyt Stoddard Curtin (September 9, 1922 – December 3, 2000) was an American composer and music producer, the primary musical director for the Hanna-Barbera animation studio from its beginnings with "The Ruff &amp; Reddy Show" in 1957 until his retirement in 1986. He composed the themes for "The Flintstones" and in "The Jetsons".