Jeff "Swampy" Marsh is an American animator associated with several animated television series. 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.
Known For
Credits
Cast Credits
Hamster & Gretel (2022)
Guest starring as Additional Voices
(8 episodes)
- Episode 1x40: Churro's Day Out (Jun 24, 2023) [Co-Star]
- Episode 1x39: Let's Sea What You've Got (Jun 24, 2023) [Co-Star]
- Episode 1x28: Romancing the Scone (Feb 4, 2023) [Co-Star]
- Episode 1x27: Hamnesia (Feb 4, 2023) [Co-Star]
- Episode 1x22: Sleepover With the Enemy (Nov 12, 2022) [Co-Star]
- Episode 1x21: Grounded (Nov 12, 2022) [Co-Star]
- Episode 1x04: Math Punch (Aug 13, 2022) [Co-Star]
- Episode 1x03: Recipe for Disaster (Aug 13, 2022) [Co-Star]
Theme Song Takeover (2019)
Guest starring as Major Monogram
- Episode 1x37: Phineas and Ferb: Major Monogram (Jan 3, 2026)
Phineas and Ferb (2007)
Starring as Major Francis Monogram
(21 episodes)
- Episode S04 Special: Phineas and Ferb the Movie: Candace Against the Universe (Aug 28, 2020)
- Episode S04 Special: O.W.C.A. Files (Nov 9, 2015)
- Episode 4x24: Troy Story (Sep 20, 2013)
- Episode 4x23: Thanks But No Thanks (Sep 13, 2013)
- Episode 4x22: Phineas and Ferb Mission Marvel (Aug 16, 2013)
- Episode 4x15: Phineas and Ferb Musical Cliptastic Countdown Hosted By Kelly Osbourne (Jun 28, 2013)
- Episode 4x10: Backyard Hodge Podge (Apr 19, 2013)
- Episode 3x50: Sci-Fi Pie Fly (Jun 8, 2012)
- Episode 3x49: Sleepwalk Surprise (Jun 8, 2012)
- Episode 3x47: Minor Monogram (May 11, 2012)
- Episode 3x36: Perry the Actorpus (Mar 3, 2012)
- Episode 3x21: Bullseye! (Sep 30, 2011)
- Episode 3x20: My Fair Goalie (Sep 9, 2011)
- Episode 3x11: Magic Carpet Ride (Jun 18, 2011)
- Episode 3x10: Candace Disconnected (Jun 18, 2011)
- Episode 1x45: Phineas and Ferb Get Busted! (Feb 16, 2009)
- Episode 1x39: One Good Scare Ought to Do It! (Oct 3, 2008)
- Episode 1x32: Traffic Cam Caper (Jul 12, 2008)
- Episode 1x24: The Ballad of Badbeard (Apr 12, 2008)
- Episode 1x18: It's a Mud, Mud, Mud, Mud World (Feb 24, 2008)
- Episode 1x01: Rollercoaster (Aug 17, 2007)
American Idol (2002)
Guest starring as Jeff Marsh
- Episode 23x18: Disney Night #2 (May 12, 2025) [Special Guest Star]
Crew Credits
Hey A.J.! (2026)
Show crew as Creator
(44 episodes)
- Episode 1x44: The Captain Durag Effect (Jun 5, 2026)
- Episode 1x43: Not The Hiccups (Jun 5, 2026)
- Episode 1x42: Family Harmony (May 1, 2026)
- Episode 1x41: Gettin in Step (May 1, 2026)
- Episode 1x40: Game Recognize Game (Apr 10, 2026)
- Episode 1x39: Jester Rella (Apr 10, 2026)
- Episode 1x38: If I Saved The World (Apr 3, 2026)
- Episode 1x37: A Little Squirrely (Apr 3, 2026)
- Episode 1x36: Time In A Bottle (Mar 27, 2026)
- Episode 1x35: Tooth Or Dare (Mar 27, 2026)
- Episode 1x34: Friendly Competition (Mar 20, 2026)
- Episode 1x33: Bunnybusters (Mar 20, 2026)
- Episode 1x32: Game Day (Mar 13, 2026)
- Episode 1x31: Rollin' (Mar 13, 2026)
- Episode 1x30: And Stuff Like That (Mar 6, 2026)
- Episode 1x29: Make Way For Play (Mar 6, 2026)
- Episode 1x28: Hide and Go Sneak (Feb 27, 2026)
- Episode 1x27: It's Not Easy Eating Greens (Feb 27, 2026)
- Episode 1x26: Rock-King It (Feb 20, 2026)
- Episode 1x25: AJ's Big Mess (Feb 20, 2026)
- Episode 1x24: Care and Care Alike (Feb 13, 2026)
- Episode 1x23: Rain Rain You Can Stay (Feb 13, 2026)
- Episode 1x22: The Present (Feb 6, 2026)
- Episode 1x21: Cloud Jumpers (Feb 6, 2026)
- Episode 1x20: Can You Dig It (Jan 30, 2026)
- Episode 1x19: Parent Of The Month (Jan 30, 2026)
- Episode 1x18: Drone Alone (Jan 23, 2026)
- Episode 1x17: Attic Adventures (Jan 23, 2026)
- Episode 1x16: Don't Mess With AJ (Jan 16, 2026)
- Episode 1x15: Keep On Truckin (Jan 16, 2026)
- Episode 1x14: Knot Today (Jan 13, 2026)
- Episode 1x13: By The Numbas (Jan 13, 2026)
- Episode 1x12: Independence Day (Jan 13, 2026)
- Episode 1x11: Nothing But The Tooth (Jan 13, 2026)
- Episode 1x10: Bein Neon Cleon (Jan 13, 2026)
- Episode 1x09: Building Blockers (Jan 13, 2026)
- Episode 1x08: Buggin (Jan 13, 2026)
- Episode 1x07: The Long Long Ride (Jan 13, 2026)
- Episode 1x06: The Trouble With Jazz (Jan 13, 2026)
- Episode 1x05: Come Here Chameleon (Jan 13, 2026)
- Episode 1x04: Birthday Bop (Jan 13, 2026)
- Episode 1x03: Donation Situation (Jan 13, 2026)
- Episode 1x02: Happy Friendship Birthday (Jan 13, 2026)
- Episode 1x01: To Mommy With Lava (Jan 13, 2026)
Show crew as Executive Producer
(44 episodes)
- Episode 1x44: The Captain Durag Effect (Jun 5, 2026)
- Episode 1x43: Not The Hiccups (Jun 5, 2026)
- Episode 1x42: Family Harmony (May 1, 2026)
- Episode 1x41: Gettin in Step (May 1, 2026)
- Episode 1x40: Game Recognize Game (Apr 10, 2026)
- Episode 1x39: Jester Rella (Apr 10, 2026)
- Episode 1x38: If I Saved The World (Apr 3, 2026)
- Episode 1x37: A Little Squirrely (Apr 3, 2026)
- Episode 1x36: Time In A Bottle (Mar 27, 2026)
- Episode 1x35: Tooth Or Dare (Mar 27, 2026)
- Episode 1x34: Friendly Competition (Mar 20, 2026)
- Episode 1x33: Bunnybusters (Mar 20, 2026)
- Episode 1x32: Game Day (Mar 13, 2026)
- Episode 1x31: Rollin' (Mar 13, 2026)
- Episode 1x30: And Stuff Like That (Mar 6, 2026)
- Episode 1x29: Make Way For Play (Mar 6, 2026)
- Episode 1x28: Hide and Go Sneak (Feb 27, 2026)
- Episode 1x27: It's Not Easy Eating Greens (Feb 27, 2026)
- Episode 1x26: Rock-King It (Feb 20, 2026)
- Episode 1x25: AJ's Big Mess (Feb 20, 2026)
- Episode 1x24: Care and Care Alike (Feb 13, 2026)
- Episode 1x23: Rain Rain You Can Stay (Feb 13, 2026)
- Episode 1x22: The Present (Feb 6, 2026)
- Episode 1x21: Cloud Jumpers (Feb 6, 2026)
- Episode 1x20: Can You Dig It (Jan 30, 2026)
- Episode 1x19: Parent Of The Month (Jan 30, 2026)
- Episode 1x18: Drone Alone (Jan 23, 2026)
- Episode 1x17: Attic Adventures (Jan 23, 2026)
- Episode 1x16: Don't Mess With AJ (Jan 16, 2026)
- Episode 1x15: Keep On Truckin (Jan 16, 2026)
- Episode 1x14: Knot Today (Jan 13, 2026)
- Episode 1x13: By The Numbas (Jan 13, 2026)
- Episode 1x12: Independence Day (Jan 13, 2026)
- Episode 1x11: Nothing But The Tooth (Jan 13, 2026)
- Episode 1x10: Bein Neon Cleon (Jan 13, 2026)
- Episode 1x09: Building Blockers (Jan 13, 2026)
- Episode 1x08: Buggin (Jan 13, 2026)
- Episode 1x07: The Long Long Ride (Jan 13, 2026)
- Episode 1x06: The Trouble With Jazz (Jan 13, 2026)
- Episode 1x05: Come Here Chameleon (Jan 13, 2026)
- Episode 1x04: Birthday Bop (Jan 13, 2026)
- Episode 1x03: Donation Situation (Jan 13, 2026)
- Episode 1x02: Happy Friendship Birthday (Jan 13, 2026)
- Episode 1x01: To Mommy With Lava (Jan 13, 2026)
Show crew as Main Title Theme
(44 episodes)
- Episode 1x44: The Captain Durag Effect (Jun 5, 2026)
- Episode 1x43: Not The Hiccups (Jun 5, 2026)
- Episode 1x42: Family Harmony (May 1, 2026)
- Episode 1x41: Gettin in Step (May 1, 2026)
- Episode 1x40: Game Recognize Game (Apr 10, 2026)
- Episode 1x39: Jester Rella (Apr 10, 2026)
- Episode 1x38: If I Saved The World (Apr 3, 2026)
- Episode 1x37: A Little Squirrely (Apr 3, 2026)
- Episode 1x36: Time In A Bottle (Mar 27, 2026)
- Episode 1x35: Tooth Or Dare (Mar 27, 2026)
- Episode 1x34: Friendly Competition (Mar 20, 2026)
- Episode 1x33: Bunnybusters (Mar 20, 2026)
- Episode 1x32: Game Day (Mar 13, 2026)
- Episode 1x31: Rollin' (Mar 13, 2026)
- Episode 1x30: And Stuff Like That (Mar 6, 2026)
- Episode 1x29: Make Way For Play (Mar 6, 2026)
- Episode 1x28: Hide and Go Sneak (Feb 27, 2026)
- Episode 1x27: It's Not Easy Eating Greens (Feb 27, 2026)
- Episode 1x26: Rock-King It (Feb 20, 2026)
- Episode 1x25: AJ's Big Mess (Feb 20, 2026)
- Episode 1x24: Care and Care Alike (Feb 13, 2026)
- Episode 1x23: Rain Rain You Can Stay (Feb 13, 2026)
- Episode 1x22: The Present (Feb 6, 2026)
- Episode 1x21: Cloud Jumpers (Feb 6, 2026)
- Episode 1x20: Can You Dig It (Jan 30, 2026)
- Episode 1x19: Parent Of The Month (Jan 30, 2026)
- Episode 1x18: Drone Alone (Jan 23, 2026)
- Episode 1x17: Attic Adventures (Jan 23, 2026)
- Episode 1x16: Don't Mess With AJ (Jan 16, 2026)
- Episode 1x15: Keep On Truckin (Jan 16, 2026)
- Episode 1x14: Knot Today (Jan 13, 2026)
- Episode 1x13: By The Numbas (Jan 13, 2026)
- Episode 1x12: Independence Day (Jan 13, 2026)
- Episode 1x11: Nothing But The Tooth (Jan 13, 2026)
- Episode 1x10: Bein Neon Cleon (Jan 13, 2026)
- Episode 1x09: Building Blockers (Jan 13, 2026)
- Episode 1x08: Buggin (Jan 13, 2026)
- Episode 1x07: The Long Long Ride (Jan 13, 2026)
- Episode 1x06: The Trouble With Jazz (Jan 13, 2026)
- Episode 1x05: Come Here Chameleon (Jan 13, 2026)
- Episode 1x04: Birthday Bop (Jan 13, 2026)
- Episode 1x03: Donation Situation (Jan 13, 2026)
- Episode 1x02: Happy Friendship Birthday (Jan 13, 2026)
- Episode 1x01: To Mommy With Lava (Jan 13, 2026)
Episode crew as Director
(44 episodes)
- Episode 1x44: The Captain Durag Effect (Jun 5, 2026)
- Episode 1x43: Not The Hiccups (Jun 5, 2026)
- Episode 1x42: Family Harmony (May 1, 2026)
- Episode 1x41: Gettin in Step (May 1, 2026)
- Episode 1x40: Game Recognize Game (Apr 10, 2026)
- Episode 1x39: Jester Rella (Apr 10, 2026)
- Episode 1x38: If I Saved The World (Apr 3, 2026)
- Episode 1x37: A Little Squirrely (Apr 3, 2026)
- Episode 1x36: Time In A Bottle (Mar 27, 2026)
- Episode 1x35: Tooth Or Dare (Mar 27, 2026)
- Episode 1x34: Friendly Competition (Mar 20, 2026)
- Episode 1x33: Bunnybusters (Mar 20, 2026)
- Episode 1x32: Game Day (Mar 13, 2026)
- Episode 1x31: Rollin' (Mar 13, 2026)
- Episode 1x30: And Stuff Like That (Mar 6, 2026)
- Episode 1x29: Make Way For Play (Mar 6, 2026)
- Episode 1x28: Hide and Go Sneak (Feb 27, 2026)
- Episode 1x27: It's Not Easy Eating Greens (Feb 27, 2026)
- Episode 1x26: Rock-King It (Feb 20, 2026)
- Episode 1x25: AJ's Big Mess (Feb 20, 2026)
- Episode 1x24: Care and Care Alike (Feb 13, 2026)
- Episode 1x23: Rain Rain You Can Stay (Feb 13, 2026)
- Episode 1x22: The Present (Feb 6, 2026)
- Episode 1x21: Cloud Jumpers (Feb 6, 2026)
- Episode 1x20: Can You Dig It (Jan 30, 2026)
- Episode 1x19: Parent Of The Month (Jan 30, 2026)
- Episode 1x18: Drone Alone (Jan 23, 2026)
- Episode 1x17: Attic Adventures (Jan 23, 2026)
- Episode 1x16: Don't Mess With AJ (Jan 16, 2026)
- Episode 1x15: Keep On Truckin (Jan 16, 2026)
- Episode 1x14: Knot Today (Jan 13, 2026)
- Episode 1x13: By The Numbas (Jan 13, 2026)
- Episode 1x12: Independence Day (Jan 13, 2026)
- Episode 1x11: Nothing But The Tooth (Jan 13, 2026)
- Episode 1x10: Bein Neon Cleon (Jan 13, 2026)
- Episode 1x09: Building Blockers (Jan 13, 2026)
- Episode 1x08: Buggin (Jan 13, 2026)
- Episode 1x07: The Long Long Ride (Jan 13, 2026)
- Episode 1x06: The Trouble With Jazz (Jan 13, 2026)
- Episode 1x05: Come Here Chameleon (Jan 13, 2026)
- Episode 1x04: Birthday Bop (Jan 13, 2026)
- Episode 1x03: Donation Situation (Jan 13, 2026)
- Episode 1x02: Happy Friendship Birthday (Jan 13, 2026)
- Episode 1x01: To Mommy With Lava (Jan 13, 2026)
Super Happy Magic Forest (2024)
Show crew as Executive Producer
(52 episodes)
- Episode 1x52: Mystery Box (Apr 21, 2025)
- Episode 1x51: Mermicorn (Apr 21, 2025)
- Episode 1x50: Herbert the Peculiar (Apr 21, 2025)
- Episode 1x49: Cower Before Zorgoth (Apr 21, 2025)
- Episode 1x48: The Legend of Bigface (Apr 21, 2025)
- Episode 1x47: The Un-Quest (Apr 21, 2025)
- Episode 1x46: Herbert's Compost (Apr 21, 2025)
- Episode 1x45: The Trouble with Trixie (Apr 21, 2025)
- Episode 1x44: Suspiciously Friendlyface (Apr 21, 2025)
- Episode 1x43: A Slippery Situation (Apr 21, 2025)
- Episode 1x42: Secret of the Unicorn (Apr 21, 2025)
- Episode 1x41: Herbert Goldenbeard (Apr 21, 2025)
- Episode 1x40: Cake Out (Apr 21, 2025)
- Episode 1x39: Good Clean Fun (Apr 21, 2025)
- Episode 1x38: 1,000th Quest (Apr 21, 2025)
- Episode 1x37: New Broom (Apr 21, 2025)
- Episode 1x36: Gnomes Might Fly (Apr 21, 2025)
- Episode 1x35: The Smell of Victory (Apr 21, 2025)
- Episode 1x34: Forgotten Fungi (Apr 21, 2025)
- Episode 1x33: Mojo Mountain (Apr 21, 2025)
- Episode 1x32: Faking It (Apr 21, 2025)
- Episode 1x31: Magic Mess (Apr 21, 2025)
- Episode 1x30: Three Wishes (Apr 21, 2025)
- Episode 1x29: Elf Help (Apr 21, 2025)
- Episode 1x28: The Merhaven Song Contest (Apr 21, 2025)
- Episode 1x27: Spiky Trevor (Apr 21, 2025)
- Episode 1x26: Snow Day (Oct 7, 2024)
- Episode 1x25: The Forest Inspectors (Oct 7, 2024)
- Episode 1x24: Pocket Beasts (Oct 7, 2024)
- Episode 1x23: The Very Important Unicorn (Oct 7, 2024)
- Episode 1x22: Goblin Guest (Oct 7, 2024)
- Episode 1x21: Trail of Wails (Oct 7, 2024)
- Episode 1x20: Fairy Squad (Oct 7, 2024)
- Episode 1x19: The Spookyween Witch (Oct 7, 2024)
- Episode 1x18: Gnome Improvements (Oct 7, 2024)
- Episode 1x17: Quester of the Year (Oct 7, 2024)
- Episode 1x16: Colour Catastrophe (Oct 7, 2024)
- Episode 1x15: Trapped in the Frolic (Oct 7, 2024)
- Episode 1x14: We the Council (Oct 7, 2024)
- Episode 1x13: The Big Birch Bird (Oct 7, 2024)
- Episode 1x12: Mid-Quest Crisis (Oct 7, 2024)
- Episode 1x11: The Magic of Panpipes (Oct 7, 2024)
- Episode 1x10: Neville the Liar (Oct 7, 2024)
- Episode 1x09: Precious Treasure (Oct 7, 2024)
- Episode 1x08: The New Wand (Oct 7, 2024)
- Episode 1x07: By the Book (Oct 7, 2024)
- Episode 1x06: The Wonky Wardrobe (Oct 7, 2024)
- Episode 1x05: Super Happy Bake-Off (Oct 7, 2024)
- Episode 1x04: The Over-Eager Eagle (Oct 7, 2024)
- Episode 1x03: Herbert's New Hat (Oct 7, 2024)
- Episode 1x02: The Mushroom King (Oct 7, 2024)
- Episode 1x01: Balloon Quest (Oct 7, 2024)
Phineas and Ferb (2007)
Show crew as Executive Producer
Show crew as Creator
- Episode 5x01: Summer Block Buster (Jun 6, 2025)
Show crew as Co-Executive Producer