Acting
Jeff 'Swampy' Marsh
Also Known As: Jeff "Swampy" Marsh , Jeff Harsh, Jeff Swampy Marsh
Birth Date
December 9, 1960
(65 years old)
Place of Birth
Santa Monica, California, USA
Popularity
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Biography
Jeff "Swampy" Marsh (born December 9, 1960) is an American animator, writer, director, producer, and voice actor associated with several animated television series, most notably as an executive producer and the voice of Major Monogram for Disney's animated series Phineas and Ferb and Milo Murphy's Law, both of which he co-created with Dan Povenmire. Marsh was born in Santa Monica, California, where he grew up with a heavily 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 television series, including King of the Hill and Rocko's Modern Life, before moving to England in 1996.
Photos
Phineas and Ferb
Francis Monogram (voice)
2007 • 263 episodes
Milo Murphy's Law
Additional Voices (voice)
2016 • 73 episodes
Phineas and Ferb the Movie: Across the 2nd Dimension
Major Francis Monogram / Monogram-2 (voice)
2011
Phineas and Ferb the Movie: Candace Against the Universe
Major Monogram (voice)
2020
Phineas and Ferb: Mission Marvel
Francis Major Monogram / Gordon Gutsofanemu / Additional Voices
2013
How Not to Draw
Major Monogram (voice)
2022 • 1 episode
Phineas and Ferb: Star Wars
Major Hologram / Imperial Officer Jeff / Additional Voices
2014
Agent P Under C
Major Monogram (voice)
2026 • 8 episodes
Spiked
Big Boss Croc / Exterminator (voice)
2025
Aaagh! It's the Mr. Hell Show!
Josh (voice)
2001 • 13 episodes
I Know That Voice
Self
2014
O.W.C.A. Files
Major Monogram / Additional Voices (voice)
2015
Bounty Hamster
(voice)
2003 • 1 episode
TV's Funniest Animated Stars: A Paley Center for Media Special
Self
2015
Phineas and Ferb: The Daze of Summer
2012
Phineas and Ferb: The Perry Files - Animal Agents
Major Monogram (voice)
2013
Untitled Phineas and Ferb Movie
Major Francis Monogram (voice)
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