
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…
2020

Spiked
as (voice)

Phineas and Ferb the Movie: Candace Against the Universe
as Major Monogram (voice)

O.W.C.A. Files
as Major Monogram / Additional Voices (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

I Know That Voice
as Self

Phineas and Ferb: Star Wars
as Major Hologram / Imperial Officer Jeff / Additional Voices

Phineas and Ferb: Night of the Living Pharmacists
as Major Francis Monogram (voice)

Phineas and Ferb Save Summer
as Major Francis Monogram / Additional Voices (voice)

Phineas and Ferb: Mission Marvel
as Francis Major Monogram / Gordon Gutsofanemu / Additional Voices

Agent P Under C
as Major Monogram (voice) · 8 ep.

How Not to Draw
as Major Monogram (voice) · 1 ep.

Milo Murphy's Law
as Additional Voices (voice) · 73 ep.

Phineas and Ferb
as Francis Monogram (voice) · 261 ep.

Bounty Hamster
as (voice) · 1 ep.

Aaagh! It's the Mr. Hell Show!
as Josh (voice) · 13 ep.