Jeff 'Swampy' Marsh
Acting
Born: 1960-12-09 · Santa Monica, California, USA
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 for
🎬 Movies (15)
Spiked
2025
Big Boss Croc / Exterminator (voice)
Phineas and Ferb the Movie: Candace Against the Universe
2020
Major Monogram (voice)
TV's Funniest Animated Stars: A Paley Center for Media Special
2015
Self
O.W.C.A. Files
2015
Major Monogram / Additional Voices (voice)
Phineas and Ferb: Last Day of Summer
2015
Major Monogram (voice)
Phineas and Ferb: Night of the Living Pharmacists
2014
Major Francis Monogram (voice)
Phineas and Ferb: Star Wars
2014
Major Hologram / Imperial Officer Jeff / Additional Voices
Phineas and Ferb Save Summer
2014
Major Francis Monogram / Additional Voices (voice)
I Know That Voice
2014
Self
Phineas and Ferb: Mission Marvel
2013
Francis Major Monogram / Gordon Gutsofanemu / Additional Voices
Phineas and Ferb: The Perry Files - Animal Agents
2013
Major Monogram (voice)
Phineas and Ferb: The Daze of Summer
2012
Phineas and Ferb The Movie: Across the 2nd Dimension
2011
Major Francis Monogram / Monogram-2 (voice)
Phineas and Ferb: Summer Belongs to You!
2010
Major Francis Monogram / Additional Voices (voice)
Phineas and Ferb Christmas Vacation!
2009
Major Monogram (voice)
