Jeff "Swampy" Marsh
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Jeffrey Kent "Swampy" Marsh is an American animator, voice actor, writer, director, and producer. With Dan Povenmire, Marsh is the co-creator and co-star of the Disney Channel animated series Phineas
Marsh in 2013
Marsh met Dan Povenmire while working on The Simpsons and continued to work alongside him on Phineas and Ferb.
Phineas and Ferb season 5
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The revival and fifth season of Phineas and Ferb premiered on Disney Channel on June 5, 2025, with the first ten episodes released on Disney+ the following day, before concluding on January 16, 2026,
Jeff "Swampy" Marsh
…Hey A.J.!. On March 16, 2023, it was announced that Marsh would be returning as executive producer and voice director for the Phineas and Ferb revival, which premiered on June 5, 2025. Marsh is married to Birgitte Bear Verburgt and has two children and four grandchildren. While attending college in England he was nicknamed "Swampy…
Promotional poster, featuring the main characters performing on stage. Doofenshmirtz and Perry are fighting in the background.
Dan Povenmire Comic Con 2009
Martin Olson by Gage Skidmore
Olivia Olson