Jeff 'Swampy' Marsh
Acting
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.
Phineas and Ferb the Movie: Candace Against the Universe
2020
Phineas and Ferb The Movie: Across the 2nd Dimension
2011
Phineas and Ferb: Mission Marvel
2013
I Know That Voice
2014
Spiked
2025
Phineas and Ferb: Star Wars
2014
Phineas and Ferb: Night of the Living Pharmacists
2014
Phineas and Ferb: Summer Belongs to You!
2010
Spiked
(voice)
Phineas and Ferb the Movie: Candace Against the Universe
Major Monogram (voice)
TV's Funniest Animated Stars: A Paley Center for Media Special
Self
O.W.C.A. Files
Major Monogram / Additional Voices (voice)
Phineas and Ferb: Last Day of Summer
Major Monogram (voice)
Phineas and Ferb: Night of the Living Pharmacists
Major Francis Monogram (voice)
Phineas and Ferb: Star Wars
Major Hologram / Imperial Officer Jeff / Additional Voices
Phineas and Ferb Save Summer
Major Francis Monogram / Additional Voices (voice)
I Know That Voice
Self
Phineas and Ferb: Mission Marvel
Francis Major Monogram / Gordon Gutsofanemu / Additional Voices
Phineas and Ferb: The Perry Files - Animal Agents
Major Monogram (voice)
Phineas and Ferb: The Daze of Summer
Phineas and Ferb The Movie: Across the 2nd Dimension
Major Francis Monogram / Monogram-2 (voice)
Phineas and Ferb: Summer Belongs to You!
Major Francis Monogram (voice) / Additional Voices
Phineas and Ferb Christmas Vacation!
Major Monogram (voice)