The Plankton: The Movie cast features Mr. Lawrence as Plankton, Jill Talley as Karen and Tom Kenny as SpongeBob. This info article contains minor spoilers and character details for Dave Needham’s 2025 Netflix movie. Check out more voice cast guides in Vague Visages’ Know the Cast category.

Plankton: The Movie takes place in the SpongeBob SquarePants universe. As a cyclops copepod plans world domination while running a restaurant, he clashes with his supercomputer wife. The narrative follows the main players as they find common round while discussing the concept of empathy. Here’s every voice actor and character in Plankton: The Movie, the second cinematic spinoff of the SpongeBob SquarePants television franchise.

Read More at VV — Know the Voice Cast: ‘Spellbound’

Plankton: The Movie Cast: Mr. Lawrence as Plankton

Character Profile: A restaurant owner and evil genius. He is a married Bikini St. University graduate who wants to take over the world. Plankton experiences an “overloads of feels” after receiving an empathy implant.

Mr. Lawrence’s Resume: Filburt Turtle in Rocko’s Modern Life (1993-96), Plankton in SpongeBob SquarePants (1999)-), Edward in Camp Lazlo! (2005-07), Ralphio in Mighty Magiswords (2016-18), Ian in Deer Squad (2020-22)

Read More at VV — Know the Cast: ‘Orion and the Dark’

Plankton: The Movie Cast: Jill Talley as Karen

Character Profile: Plankton’s supercomputer wife. She develops a 24-hour fusion restaurant and wants to dominate the world. Karen plots against her husband due to his egocentric behavior.

Talley’s Resume: Gail in Seinfeld (1996-97), Sarah Dubois in The Boondocks (2005-14), Cindy in Little Miss Sunshine (2006), Mom in The Loud House (2016-), Bonnie in Chicago Party Aunt (2021-22)

Read More at VV — Know the Voice Cast: ‘Leo’

Plankton: The Movie Cast: Tom Kenny as SpongeBob

Character Profile: A Bikini Bottom resident. He is a psychiatrist enthusiast who initially plants to help the “jerk” Plankton. SpongeBob appreciates a good love story.

Kenny’s Resume: Heffer Wolfe in Rocko’s Modern Life (1993-96), Narrator in The Powerpuff Girls (1998-2004), SpongeBob in SpongeBob SquarePants (1999-), Asok in Dilbert (1999-2000), Wheelie in Transformers: Dark of the Moon (2011)

Read More at VV — Know the Cast & Characters: ‘Nimona’

Plankton: The Movie Cast: Bill Fagerbakke as Patrick

Character Profile: SpongeBob’s starfish friend. He is big fan of ketchup. Patrick teams up with SpongeBob during the film’s final act.

Fagerbakke’s Resume: Patrick Star in SpongeBob SquarePants (1999-), Jonas’ Dad in Jennifer’s Body (2009), Scarecrow in Dorothy and the Wizard of Oz (2017-20), Patrick Star in The Patrick Star Show (2021-24), Jake Rutledge in Young Sheldon (2021-23)

Read More at VV — Know the Voice Cast & Characters: ‘Guillermo Del Toro’s Pinocchio’

Plankton: The Movie Cast: Rodger Bumpass as Squidward

Character Profile: An octopus. He is SpongeBob’s neighbor. Squidward gets involved in Patrick’s business.

Bumpass’s Resume: Dancer in Escape from New York (1981), Phil Hilton in The Running Man (1987), Chief in Where on Earth Is Carmen Sandiego? (1994-99), Squidward in SpongeBob SquarePants (1999-), Biclops in ChalkZone (2002-08)

Read More at VV — Know the Voice Cast & Characters: ‘Scrooge: A Christmas Carol’

Plankton: The Movie Cast: Carolyn Lawrence as Sandy

Character Profile: Karen’s gal pal. She is a squirrel who enjoys movies. Sandy puts Karen’s empathy chip in Plankton’s brain.

Lawrence’s Resume: May in Wings (1996), Sandy Cheeks in SpongeBob SquarePants (1999-2005), Cindy Vortex in The Adventures of Jimmy Neutron, Boy Genius (2002-06), Orel Puppington in Moral Orel (2005-08), Mandragora in Winx Club: The Secret of the Lost Kingdom (2007)

Read More at VV — Know the Voice Cast: ‘The Sea Beast’

The Plankton: The Movie cast also includes:

• Clancy Brown as Mr. Krabs/Pa Plankton (Voice)
• Mary Jo Catlett as Mrs. Puff (Voice)
• Lori Alan as Pearl/A Woman in Crowd
• Dee Bradley Baker as Perch Perkins/Roommate/Guy in the Back of the Crowd/Muscle Fish (Voice)
• Kate Higgins as Ma Plankton (Voice)
• Genesis Clarre as Bucket Girl
• Sale Taylor as Ice Cream Guy
• Natalie Kailey as Sunblock Gal
• Austin Valli as Fitness Bro

Q.V. Hough (@QVHough) is Vague Visages’ founding editor.