Jeff "Swampy" Marsh

Jeff "Swampy" Marsh is an American animator, writer, director, producer, and voice actor involved in several animated TV shows, most notably as an executive producer and the voice of Major Monogram, for Disney's popular animated series Phineas and Ferb and Milo Murphy's Law, which he co-created with Dan Povenmire. Marsh was born in Santa Monica, California, where he grew up with a largely blended family dynamic. Marsh has been and continues to be a driving force behind several animation projects, working for over six seasons on the animated television series The Simpsons. Marsh continued to work on other animated shows, such as King of the Hill and Rocko's Modern Life, before moving to England in 1996.