Jeff 'Swampy' Marsh
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.
Known For
Phineas and Ferb
Milo Murphy's Law
Phineas and Ferb The Movie: Across the 2nd Dimension
Agent P Under C
Phineas and Ferb the Movie: Candace Against the Universe
Phineas and Ferb: Mission Marvel
How Not to Draw
I Know That Voice
All Movies (16)
- Spiked2025 · as Big Boss Croc / Exterminator (voice)
- Phineas and Ferb the Movie: Candace Against the Universe2020 · as Major Monogram (voice)
- TV's Funniest Animated Stars: A Paley Center for Media Special2015 · as Self
- O.W.C.A. Files2015 · as Major Monogram / Additional Voices (voice)
- Phineas and Ferb: Last Day of Summer2015 · as Major Monogram (voice)
- Phineas and Ferb: Night of the Living Pharmacists2014 · as Major Francis Monogram (voice)
- Phineas and Ferb: Star Wars2014 · as Major Hologram / Imperial Officer Jeff / Additional Voices
- Phineas and Ferb Save Summer2014 · as Major Francis Monogram / Additional Voices (voice)
- I Know That Voice2014 · as Self
- Phineas and Ferb: Mission Marvel2013 · as Francis Major Monogram / Gordon Gutsofanemu / Additional Voices
- Phineas and Ferb: The Perry Files - Animal Agents2013 · as Major Monogram (voice)
- Phineas and Ferb: The Daze of Summer2012
- Phineas and Ferb The Movie: Across the 2nd Dimension2011 · as Major Francis Monogram / Monogram-2 (voice)
- Phineas and Ferb: Summer Belongs to You!2010 · as Major Francis Monogram / Additional Voices (voice)
- Phineas and Ferb Christmas Vacation!2009 · as Major Monogram (voice)
- Untitled Phineas and Ferb Movie— · as Major Francis Monogram (voice)
All TV Shows (6)
- Agent P Under C2026 · as Major Monogram (voice)
- How Not to Draw2022 · as Major Monogram (voice)
- Milo Murphy's Law2016 · as Additional Voices (voice)
- Phineas and Ferb2007 · as Francis Monogram (voice)
- Bounty Hamster2003 · as (voice)
- Aaagh! It's the Mr. Hell Show!2001 · as Josh (voice)