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.
2020
as Major Monogram (voice)
2016
as Additional Voices (voice)
2015
as Self
2015
as Major Monogram / Additional Voices (voice)
2015
as Major Monogram (voice)
2014
as Major Francis Monogram (voice)
2014
as Major Hologram / Imperial Officer Jeff / Additional Voices
2014
as Self
2013
as Francis Major Monogram / Gordon Gutsofanemu / Additional Voices
2013
as Major Monogram (voice)
2012
2011
as Major Francis Monogram / Monogram-2 (voice)
2010
as Major Francis Monogram (voice) / Additional Voices
2009
as Major Monogram (voice)
2007
as Francis Monogram (voice)
2003
as (voice)
2001
as Josh (voice)