Jeff 'Swampy' Marsh
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.
Acting
2025
(voice)
2022
Major Monogram (voice)
2020
Major Monogram (voice)
2016
Additional Voices (voice)
2015
Major Monogram / Additional Voices (voice)
2015
Major Monogram (voice)
2014
Major Francis Monogram (voice)
2014
Major Hologram / Imperial Officer Jeff / Additional Voices
2014
Major Francis Monogram / Additional Voices (voice)
2014
2013
Francis Major Monogram / Gordon Gutsofanemu / Additional Voices
2011
Major Francis Monogram / Monogram-2 (voice)
2010
Major Francis Monogram (voice) / Additional Voices
2009
Major Monogram (voice)
2007
Francis Monogram (voice)
2001
Josh (voice)
Writing
2020
2020
2017
Writer
2016
Story
2014
Characters
2013
Characters
2011
2010
2007
Writer
2007
Story
Production
2026
Executive Producer
2024
Executive Producer
2020
Executive Producer
2016
Executive Producer
2015
Executive Producer
2011
Executive Producer
2009
2007
Executive Producer
Crew
2014
2014
Creator
2014
Creator
2011
Sequence Supervisor
2010
Additional Writing
1993
Additional Writing
Creator
Directing
Art
1993
Storyboard Artist
Infos
Jeff 'Swampy' Marsh
Male
12/9/1960
Jeff "Swampy" Marsh
Jeff Harsh
Jeff Swampy Marsh
Jeffrey Marsh
Jeff Marsh
Swampy Marsh
Swampi Marsh
Jeffrey "Swampy" Marsh