Jeff 'Swampy' Marsh
Acting • AGE 65
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 produc...
Acting
Agent P Under C
Major Monogram (voice)
2026
Hey A.J.!
Executive Producer
2026
Cartoonified! With Phineas and Ferb
Creator
2025
Spiked
Big Boss Croc / Exterminator (voice)
2025
Super Happy Magic Forest
Executive Producer
2024
How Not to Draw
Major Monogram (voice)
2022
Phineas and Ferb the Movie: Candace Against the Universe
Major Monogram (voice)
2020
Pete the Cat
Writer
2017
Milo Murphy's Law
Additional Voices (voice)
2016
TV's Funniest Animated Stars: A Paley Center for Media Special
Self
2015
O.W.C.A. Files
Major Monogram / Additional Voices (voice)
2015
Phineas and Ferb: Last Day of Summer
Major Monogram (voice)
2015
Phineas and Ferb: Night of the Living Pharmacists
Major Francis Monogram (voice)
2014
Phineas and Ferb: Star Wars
Major Hologram / Imperial Officer Jeff / Additional Voices
2014
Phineas and Ferb Save Summer
Major Francis Monogram / Additional Voices (voice)
2014
I Know That Voice
Self
2014
Phineas and Ferb: Mission Marvel
Francis Major Monogram / Gordon Gutsofanemu / Additional Voices
2013
Phineas and Ferb: The Perry Files - Animal Agents
Major Monogram (voice)
2013
Phineas and Ferb: The Daze of Summer
2012
Phineas and Ferb The Movie: Across the 2nd Dimension
Major Francis Monogram / Monogram-2 (voice)
2011
Take Two with Phineas and Ferb
Executive Producer
2010
Phineas and Ferb: Summer Belongs to You!
Major Francis Monogram / Additional Voices (voice)
2010
Phineas and Ferb Christmas Vacation!
Major Monogram (voice)
2009
Phineas and Ferb
Francis Monogram (voice)
2007
Shadow of the Elves
Director
2004
Bounty Hamster
(voice)
2003
Aaagh! It's the Mr. Hell Show!
Josh (voice)
2001
Looks Can Kill
Associate Producer
1994
Rocko's Modern Life
Storyboard Artist
1993
Untitled Phineas and Ferb Movie
Major Francis Monogram (voice)