Jeff "Swampy" Marsh

Jeffrey Kent "Swampy" Marsh (; born December 9, 1960) is an American animator, voice actor, writer, director, and producer. With Dan Povenmire, Marsh co-created the Disney Channel animated series ''Phineas and Ferb'' and ''Milo Murphy's Law'', in both of which he voiced the character Major Francis Monogram. Marsh was born in Santa Monica, California, where he grew up with a heavily blended family dynamic. Marsh is known for his contributions to the television animation industry, working for over six seasons on the animated television series ''The Simpsons''. Marsh continued to work on other animated television series, including ''King of the Hill'' and ''Rocko's Modern Life,'' before moving to England in 1996.

While in England, Marsh worked on several animated programs, including ''Postman Pat'' and ''Bounty Hamster,'' and worked for BKN New Media Ltd. to produce several feature films. After six years living in England, Marsh was asked by his longtime partner Dan Povenmire to help produce ''Phineas and Ferb'' in 2007, a concept the two had while working together on ''Rocko's Modern Life.'' Marsh accepted and moved back to the United States, the series has since garnered Marsh two Emmy Awards nominations for songwriting. After ''Phineas and Ferb'', Marsh and Povenmire created and produced ''Milo Murphy's Law'', which premiered in 2016. Together they created a second ''Phineas and Ferb'' film in 2020, called ''Candace Against the Universe''. Provided by Wikipedia