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.

Photo

Awards and Honors

Critical Favorites

2020Nominee

Best Performance

Phineas and Ferb the Movie: Candace Against the Universe

2011Nominee

Best Performance

Phineas and Ferb the Movie: Across the 2nd Dimension

2013Nominee

Best Performance

Phineas and Ferb: Mission Marvel

Career Highlights

2014Highlight

Best Performance

Phineas and Ferb: Star Wars

2025Highlight

Best Performance

Spiked

Video

TrailerOfficial Trailer

Phineas and Ferb the Movie: Candace Against the Universe

TrailerOfficial Trailer - Phineas and Ferb: Across the 2nd Dimension

Phineas and Ferb the Movie: Across the 2nd Dimension

TrailerPhineas and Ferb: Mission Marvel Trailer

Phineas and Ferb: Mission Marvel