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Jeff 'Swampy' Marsh

Jeff 'Swampy' Marsh was born on December 9, 1960 in Santa Monica, California, USA. He is an actor and writer, known for Phineas and Ferb (2007), Phineas and Ferb the Movie: Across the 2nd Dimension (2011) and Rocko's Modern Life (1993). He has been married to Birgitte since December 17, 2006. They have two children. See full bio »

Get to Know These First-Time Oscar Nominees

Andrew Garfield, Mahershala Ali, Ruth Negga, and five others received their first-ever acting nominations for 2017. While these actors are new to the Academy Awards, you may recognize them from their earlier work.

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Nominated for 6 Primetime Emmys. Another 2 wins & 6 nominations. See more awards »

Known For

Phineas and Ferb
Phineas and Ferb Major Francis Monogram / Himself / Additional Voices / Badinka-Dink / Buford / Monobrow / Monogram-Fairy / Monopunzal / Regent Monogram
Phineas and Ferb the Movie: Across the 2nd Dimension
Phineas and Ferb the Movie: Across the 2nd Dimension Major Francis Monogram / Monogram-2
Rocko's Modern Life
Milo Murphy's Law
Milo Murphy's Law Balthazar Cavendish / Additional Voices


Hide Hide Show Show Actor (7 credits)
 2016 Milo Murphy's Law (TV Series)
Balthazar Cavendish / Additional Voices
- Family Vacation/Murphy's Lard (2016) ... Balthazar Cavendish (voice)
- Worked Day/Wilder West (2016) ... Balthazar Cavendish / Additional Voices (voice)
- Party of Peril/Smooth Opera-tor (2016) ... Balthazar Cavendish / Additional Voices (voice)
- The Doctor Zone Files/The Note (2016) ... Balthazar Cavendish / Additional Voices (voice)
- Sunny Side Up (2016) ... (voice)
 2016 Better Things (TV Series)
Director / Writer Guy
- Alarms (2016) ... Director / Writer Guy
 2014-2015 Ronja, the Robber's Daughter (TV Series)
Musician B
- One Strong Band of Robbers (2015) ... Musician B
- Autumn Deepens in the Forest (2014) ... Musician B
- The Child Born on a Stormy Night (2014) ... Musician B
 2003 Bounty Hamster (TV Series)
 2001-2002 Aaagh! It's the Mr. Hell Show! (TV Series)
- The Seven Ages (2002) ... Josh (voice, uncredited)
- Blinded by Science and Rosy Palmer (2002) ... Josh (voice, uncredited)
- Hellathon (2001) ... Josh (voice, uncredited)
- Right Royal Rain Rin Re Rass (2001) ... Josh (voice, uncredited)
- From Here to Paternity (2001) ... Josh (voice, uncredited)
Show Show Writer (8 credits)
Show Show Producer (6 credits)
Show Show Music department (2 credits)
Show Show Soundtrack (5 credits)
Show Show Art department (7 credits)
Show Show Director (3 credits)
Show Show Animation department (4 credits)
Show Show Miscellaneous Crew (4 credits)
Show Show Art director (1 credit)
Show Show Visual effects (1 credit)
Show Show Self (5 credits)

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Alternate Names:

Jeff Harsh | Jeff Swampy Marsh | Jeffrey Marsh | Jeff Marsh | Swampi Marsh | Swampy Marsh

Did You Know?


Temporarily lived in England before moving back to California to air Phineas and Ferb (2007). See more »

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