Jeffrey K. Marsh also known as Jeff "Swampy" Marsh and Swampy (born December 9, 1960) is an American animator, writer, director, producer, and voice actor associated with several animated television series. He portrays the voice of Major Monogram in the Disney XD cartoons Phineas and Ferb and Milo Murphy's Law, both of which he co-created with Dan Povenmire. In Milo Murphy's Law, he also voices Balthazar Cavendish, Cavenpuss, Armory Security Guard, Lieutenant Tennant, and Mantel.
Episodes he wrote
- During his time in England, friends began calling him "Swampy" and "Boggy", playing off of his last name. He told them that he did not want to be called "Boggy". After his return to the United States, other friends heard of his nickname and also began calling him "Swampy". After a while, Jeff began to like it.
- He is the grandson of world-renowned bandleader and songwriter, Les Brown.
- Currently married; wife of Dutch descent, which explains why Phineas and Ferb has so many references to the Netherlands, such as Buford Van Stomm's last name, Florraine from Imperfect Storm only speaking Dutch, and Paolo Vanderbeek being part-Dutch.
- As for Phineas and Ferb, he appears as himself in Tri-Stone Area, Phineas and Ferb: Star Wars, and Act Your Age.
Milo Murphy's Law
- He can be seen (animated) in "Battle of the Bands", "Pace Makes Waste", and "Abducting Murphy's Law".
- He has voiced the most characters out of the show. All of his roles (in order of appearance); Balthazar Cavendish, Lieutenant Tennant, Francis Monogram, Mantel, Armory Security Guard, and Cavenpuss.
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|Creators||Jeff "Swampy" Marsh • Dan Povenmire|
|Writers||Jim Bernstein • Jeff "Swampy" Marsh • Dan Povenmire • Kyle Menke • Martin Olson • Scott Peterson • Joshua Pruett • Dani Vetere • Marja Adriance • Valerie Breiman|
|Storyboard Artists||Jacob Hair • Diana Huh • Kyle Menke • Dan Povenmire • Edward Rivera • Joseph S. Scott • Ashley Michelle Simpson • Calvin Suggs • Steven Umbleby • Chris Ybarra • Lauren Andrews|
|Directors||Bob Bowen • Robert F. Hughes • Dan Povenmire|