
Jeff 'Swampy' Marsh
- Date of Birth: 1960-12-09
- Place of Birth: 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 produc... 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.

Phineas and Ferb The Movie: Across the 2nd Dimension
Animation, Comedy, Family, TV Movie, Science Fiction, Adventure, Action, Music • 2011 August

Phineas and Ferb: The Daze of Summer
Family, Animation, Comedy • 2012 February

Phineas and Ferb Christmas Vacation!
Action, Animation, Comedy • 2009 December

Phineas and Ferb: Mission Marvel
Animation, Family, Comedy, TV Movie, Action, Adventure, Science Fiction, Music • 2013 August

Aaagh! It's the Mr. Hell Show!
Animation, Comedy • 2001 October

Spiked
Animation, Family, Adventure • 2025 July

TV's Funniest Animated Stars: A Paley Center for Media Special
Documentary, Animation • 2015 December

Phineas and Ferb Save Summer
Action, Adventure, Animation, Comedy, Family, Science Fiction, TV Movie • 2014 June

Bounty Hamster
Animation • 2003 January