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.

Most Known For

Phineas and Ferb

as Francis Monogram (voice)

Milo Murphy's Law

as Additional Voices (voice)

Phineas and Ferb The Movie: Across the 2nd Dimension

as Major Francis Monogram / Monogram-2 (voice)

Phineas and Ferb the Movie: Candace Against the Universe

as Major Monogram (voice)

Bounty Hamster

as (voice)

Phineas and Ferb: Mission Marvel

as Francis Major Monogram / Gordon Gutsofanemu / Additional Voices

How NOT to Draw

as Major Monogram (voice)

Spiked

as (voice)

Phineas and Ferb: Star Wars

as Major Hologram / Imperial Officer Jeff / Additional Voices

Aaagh! It's the Mr. Hell Show!

as Josh (voice)

I Know That Voice

as Self

Phineas and Ferb: Night of the Living Pharmacists

as Major Francis Monogram (voice)

Phineas and Ferb Christmas Vacation!

as Major Monogram (voice)

Phineas and Ferb: Summer Belongs to You!

as Major Francis Monogram (voice) / Additional Voices

Agent P, Under C

as Major Monogram (voice)

Phineas and Ferb: Last Day of Summer

as Major Monogram (voice)

TV's Funniest Animated Stars: A Paley Center for Media Special

as Self

Phineas and Ferb Save Summer

as Major Francis Monogram / Additional Voices (voice)

O.W.C.A. Files

as Major Monogram / Additional Voices (voice)

Phineas and Ferb: The Perry Files - Animal Agents

as Major Monogram (voice)