Jeff "Swampy" Marsh

Jeff "Swampy" Marsh
Marsh at the 2009 San Diego Comic Con International
Born	Jeffrey Marsh (1960-12-09) December 9, 1960 (age 56) Santa Monica, California
Occupation	Animator
Years active	1989–present
Known for	Phineas and Ferb, Milo Murphy's Law, Rocko's Modern Life, The Simpsons

Jeff "Swampy" Marsh (born December 9, 1960) is an American animator associated with several animated television series, most notably as the co-creator & executive producer of Disney's animated seriess Phineas and Ferb. 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.

While in England, Marsh worked on several animated programs, including Postman Pat and Bounty Hamster, and worked for BKN New Media Ltd. to produce several feature films. After six years living in England, Marsh was asked by his longtime partner Dan Povenmire to help produce Phineas and Ferb in 2007, a concept the two had while working together on Rocko's Modern Life. Marsh accepted and moved back to the United States; the series has since garnered Marsh two Emmy Awards nominations for songwriting. According to an original pitch extra of Phineas and Ferb, he prefers having "Swampy" in his name, because it made his name 15 letters long and longer than most other people's names. As of 2015, he and Povenmire are currently producing a new series for Disney XD titled Milo Murphy's Law, which premiered on October 3, 2016.

Marsh was born on December 9, 1960, in Santa Monica, California. Marsh was raised in a large and complicated blended family, which included his stepfather Bill. Growing up, he never felt the dynamic was treated in the media coherently enough to make it seem "normal," which Marsh felt was unjustified since the majority of his friends were from either divorced or blended familial structures.

Marsh spent his summer vacations being active, going outside and digging trenches and tunnels, building tree houses, and constructing forts. He and his family were engrossed in several musical activities, with musical background dating back to Les Brown, Marsh's grandfather. His household was filled with several different musical instruments and over the years, Marsh learned to play the banjo, trombone, trumpet, and guitar. As Marsh recalls, he would "sing into fake microphones and create full rock bands with [his] friends and family."