Main

• Gretel Grant-Gomez (voiced by Meli Povenmire)^[2] – Kevin's excitable younger sister who gains superpowers and becomes a superheroine. While she means well, Gretel has a tendency to make problems worse by using brute force.
• Kevin Grant-Gomez (voiced by Michael Cimino)^[2] – A 16-year-old^[3][4] boy and Gretel's older brother who tries to support Hamster and Gretel in being superheroes. Despite lacking superpowers of his own, he is the brains of the group due to his quick-thinking skills and ability to solve problems in dire moments.
• Hamster (voiced by Beck Bennett)^[2] – Kevin and Gretel's stoic pet hamster who gets superpowers along with Gretel. He also gets the ability to speak, but generally only does so in moments of comic relief.
• Winifred "Fred" Grant^[5] (voiced by Joey King)^[2] – Kevin and Gretel's deadpan, sarcastic, cynical, and tech-savvy cousin, who acts as the team's tech support. She also has gymnastic abilities, which were first shown in "Cheer Cheer Bang Bang".
• Dave Grant (voiced by Matt Jones)^[2] – Kevin and Gretel's father who works as a building manager at an apartment complex. He is physically modeled after series creator Dan Povenmire.^[6]
• Carolina Grant-Gomez (voiced by Carolina Ravassa)^[2] – Kevin and Gretel's eccentric yet wise Venezuelan mother who works as a nurse.

Recurring

• Churro (vocal effects by Dee Bradley Baker) – The Grant-Gomez family's dimwitted pet dog, whose mischief sometimes gets in the way of his owners.
• Abuelita Gomez (voiced by Jenny Lorenzo) – Carolina's strict mother and the maternal grandmother of Kevin and Gretel. She usually forces the kids to focus on chores whenever she babysits them and is one of the few family members to know Gretel's secret.
• Bailey Carter^[7] (voiced by Priah Ferguson)^[8] – Gretel's best friend who is also a major fan of the superhero Gretel. She was initially unaware that they were one and the same until "My Invisible Friend".
• Roman Carter (voiced by Michael-Leon Wooley) – Bailey's father who works as a video game producer.
• Nordle Ampersand (voiced by Pamela Adlon) – A nerdy and wealthy boy in Gretel's class who is the son of Professor Exclamation, but has no interest in villainy. He is friends with Gretel and Bailey but is unaware of the former's superhero identity.
• Tobor (voiced by Alex Estrada) – Nordle's semi-competent robotic companion who waits on his hand and foot, but secretly wishes to earn his respect. His name is an anagram of 'robot'.
• Veronica Hill (voiced by Liza Koshy)^[8] – A blunt, snarky news reporter who often weaves her personal issues into the current stories.
• Anthony (voiced by Akintoye)^[8] – Kevin's confident buddy.
• Hiromi Tanaka^[9] (voiced by Hiromi Dames) – A girl who works at a comic book store and is also Kevin's crush.^[10]
• Naya (voiced by Abby Espiritu) – The head cheerleader at Kevin and Fred's high school. A running gag involves her commenting on other characters' cartoonish disguises.
• Clyde and Andrew (voiced by Dan Povenmire and Jeff "Swampy" Marsh) – A pair of elderly men who are always playing chess throughout the city. They often witness the collateral damage from Hamster and Gretel's heroics, automatically assuming that they were staged as a distraction to sway the game.
• Unseen aliens (voiced by Dan Povenmire and Joanna Hausmann) – The unseen entities that ride in a UFO and give superpowers to random strangers and items such as Hamster and Gretel, FistPuncher and The Destructress, La Cebolla, Itsy Bitsy, a bouncy castle, a leftover sloppy joe, and a scone.

Villains

• Jack Ampersand/Professor Exclamation (voiced by Phil LaMarr) – A punctuation-themed supervillain who has short arms due to losing his elbows in a freak accident, and now wants to make the world bend to him.
• Lauren/The Destructress and Lyle/FistPuncher (voiced by Alyson Stoner and Brock Powell respectively)^[8] – Fraternal twins who had an encounter with the same aliens as Hamster and Gretel, granting them similar powers. Unlike the latter, they were told to use their powers for evil, becoming supervillains as a result. Starting with "The Bitter Sitter", Lauren has a second job as a babysitter in order to have a non-evil hustle.
• El Luchador (voiced by Carlos Alazraqui) – A wrestler-themed supervillain who loves ropa vieja.
• Rodney Thunderpants (voiced by James Adomian) – A cowboy who has electrokinesis and a deep hatred of cellphones.
• Van Dyke (voiced by Casey Hamilton) – A sentient Van Dyke beard who can possess people by attaching himself to their faces. After getting shredded by a lawnmower, he later puts himself back together as a moustache.
• Coach Haggerty (voiced by Betsy Sodaro) – A cheerleading coach that hypnotizes people to commit crimes for her using her whistle.
• La Cebolla (voiced by Karina La Voz) – A former telenovela star-turned-villainess who encountered the unseen aliens, granting her the ability to communicate with onions and onion-related plants.
• CopyCat (voiced by Eric Bauza) – A comic book geek with a huge trust fund and a degree in engineering who invents a super suit based on the comic book character "Man Cat."
• Neighslayer (voiced by Thomas Sanders) – A former track star who was mutated into a half-horse half-man mutant after an experiment gone awry. This left him with horse hooves in place of his human arms and legs.
• Dr. Eelgood (voiced by Keith Ferguson) – A mad scientist who has sworn revenge on the local aquarium and has genetically engineered a nearly indestructible eel. He was one of Dave's tenants, although he was evicted when his experiments were exposed.
• The X-terminator (voiced by John DiMaggio) – A supervillain who has a vendetta against rodents of all kinds after his human body was accidentally merged with his rat-catching device.
• The Amplifier (voiced by Khary Payton) – A supervillain with a ray gun that can dramatically increase the size of whatever it shoots.
• The Nightmarionette (voiced by Michael-Leon Wooley) – A villain who can create life-like projections of people's greatest fears.
• Bob Infantiburg/Big Baby (voiced by Brock Powell) – A former mayoral candidate and Veronica Hill's ex-boyfriend who accidentally turned himself into a kaiju-sized baby.
• Tina (voiced by Camryn Grimes) – A new student in Gretel and Bailey's class who turns out to be a spy from the country of Bolgylvania.
• The Earworm (voiced by Adam Rose) – A songwriting supervillain whose evil jingle hypnotizes Hamster and Gretel.
• Christine DuPoulet/The East Side Bantam (voiced by Cree Summer) – The former chicken-like school mascot that tries to sabotage every school play after being replaced by the East Side Plumber mascot. She was said to have disappeared during the stage production of The Vikings of Venzance, but in reality she fled due to severe stage fright and hid under the stage while dressed as the East Side Bantam. After being thwarted by Gretel, who also suffered from stage fright, Christine became the new mascot of "Frank's Discounted Discount Costumes".
• Record Scratch (voiced By Camryn Grimes) – A villain who can take over the world with her DJ skills.
• The Imposter (voiced by Diedrich Bader) – A villain who wears multiple disguises.
• Ernie (voiced by Brock Powell) – A baker villain that attacks people with his "divorce cakes" after people refused to buy them.
• Belle (voiced by Karalynn Dunton) – A social media influencer who starts a smear campaign against Hamster and Gretel to increase her number of followers.
• Arthouse (voiced by Diedrich Bader) – A disgruntled film artist who produces mundane short films.
• Tchotchke Jones (voiced by Richard Kind) – A tchotchke shop owner, who shrinks historical landmarks and puts them in bottles.
• Micromanager (voiced by John Hodgman) – The owner of Small Burger and a former employee of Tall Burger who got fired after he accidentally shrunk himself with a device meant to shrink onions and now wants to literally destroy his competition.
• Charlie/Father Goose (voiced by Isaac Robinson-Smith) – A man with goose wings on his rear end who wants to bring about the next step of human evolution by turning the populace into geese.
• Helen/Rat Burglar (voiced by Rachel Dratch) – A villain dressed as a rat, who uses "Invisible Ink" on herself to secretly help her son, Xavier, cheat in contests without getting caught.
• Crimson Haste (voiced by Sarah Sherman) – A villainess with supersonic speed, who runs a rapid local delivery service by stealing the goods unnoticed.
• Bob Stanley Cashwell / Unknownzy (voiced by Isaac Robinson-Smith) – A masked villain who invested in, and later vandalized, Hiromi's mural.
• Stan / Pendulum Pete (voiced by Diedrich Bader) – A villain with grandfather clock pendulums for arms, who has a deep loathing for digital clocks.
• Inga the Ice Queen (voiced by Danielle Threet) – A Swiss cryokinetic villainess who owns an ice cream parlor and traps cool people in ice to force them to be her friends.
• La Sombrerona (voiced by Joanna Hausmann) – A villainess who wears five hats as a tribute to her five dead husbands, and now strives to strip everyone of their happiness.
• Simon (voiced by Brock Powell) – A talking nanobot, who has the ability to control people and transform them into cyborgs.
• Julie Jennings / Dr. MedusaSaurus (voiced by Lexie Shoaibi) – A paleontologist who was trapped in a tar pit for 30 years and was reawakened thanks to the aliens. Not credited for the fossils she found; she goes to war with the owners of the natural history museum.
• Itsy Bitsy (voiced by Tessa Skara) – A villainess who was fused with a spider on her shoulder during an encounter with the aliens, gaining the ability to shoot spider-webs from her underarms.
• Bayou Barb (voiced by Jane Lynch) – A former diner employee who was fused to waffle irons and a toxic waste-infused tree, turning into a misunderstood monster and a local bayou legend.
• Librarian (voiced by Cree Summer) – The local librarian who wishes to make the city as quiet as her workplace by stealing the populace's voices.
• Mary Mitosis (voiced by Debra Wilson) – A villainess with the ability to duplicate herself.
• The Flake (voiced by Kyle Mooney) – A villain who gained the ability to turn into flakes after being fused with a croissant.

Theme Song Takeover

As part of a promotional campaign, Disney Channel began airing the Disney Theme Song Takeover wherein supporting characters from different shows performed the theme song to the series they were in.

Chibi Tiny Tales

Chibi Tiny Tales is a series of shorts that depict characters from various Disney Channel properties in chibi-style animation. In September 2022, the series began releasing shorts based around Hamster & Gretel.

Development

In October 2020, it was reported that Phineas and Ferb and Milo Murphy's Law co-creator Dan Povenmire was developing a new animated series with a 20-episode order for Disney Channel, titled Hamster & Gretel, with Disney Television Animation producing.^[50] Povenmire first pitched the show as an animatic in 2019, with him providing all the voices. The character of Hamster originated from a drawing he did on his sketchboard during development on the Disney+ film Phineas and Ferb the Movie: Candace Against the Universe (2020). It was later refined whilst Povenmire was on a vacation with his family in Aruba.^[51][6] The series marks Povenmire's first project as showrunner without Jeff "Swampy" Marsh, due to the latter developing projects of his own after creating his own studio. However, Marsh will still have a recurring voice role as various characters on the series.^[52]

In September 2021, Joanna Hausmann joined the series as its head writer, co-producer, and story editor.^[53] Povenmire approached her after listening to Hausman talking about her experiences as a Venezuelan, as he felt she could bring authenticity to the series' Venezuelan representation.^[6] Povenmire has also stated that the show boasts ADHD representation, through Gretel.^[54]

In June 2022, it was announced that ten additional episodes had been ordered, bringing the total episode number to 30.^[55] On January 13, 2023, it was announced that the series was renewed for a second season, as part of an overall deal between Povenmire and Disney Branded Television.^[56]

Animation

Snipple Animation and Synergy Animation both provide animation services for the series; work on the first episodes finished by May 2022.^[61][62] Episodes are produced simultaneously at different stages, with some in pre-production and others in post-production.^[57] The series will feature action sequences that have more cinematic quality than Phineas and Ferb and Milo Murphy's Law.^[58][62]

Music

Similar to his previous work, Povenmire wrote songs for the series. The soundtrack was released the day of the series' premiere.^[57]

Critical response

Brandon Zachary of Comic Book Resources stated, "Hamster & Gretel delivers a new take on a lot of well-worn genres from Disney Animation. It's quietly a solid parody of superhero narratives, with one of the minds behind Phineas and Ferb helping usher in a new generation of bizarre heroes and villains. It's a down-to-earth cartoon sitcom focusing on a multicultural family dealing with some absurd situations. It's also a show where a hamster sometimes punches adults into submission – a very silly direction that was very much by design."^[64] Tony Betti of LaughingPlace.com gave Hamster & Gretel a grade of 4 out of 5 stars, saying, "At only a few episodes in so far, the show has already started building a universe that is sure to become lush and full of details and recurring characters that we will likely see throughout. While the show already has a built-in villain-of-the-week premise, the setup has also been built to include overarching enemies and even non-threatening characters that we'll see again and again. Namely cousin Fred, and Kevin's crush. We also see hints at how expansive Kevin and Gretel's family is, all of which will likely come into play in the weeks and months ahead, giving fans a world in which they can immerse themselves into when viewing and will likely keep them coming back for more. However, they need to figure out the target audience where those fans will come from first. Once they do, (and they still have time) it will be solid programming."^[65]

Diondra Brown of Common Sense Media gave the series a grade of 3 out of 5 stars and praised the depiction of positive messages and role models, stating the characters promote self authenticity, friendship, and helpfulness, while noting the diverse representations across the racial and religious backgrounds of different characters.^[66] Neville Naidoo of MovieWeb ranked Hamster & Gretel 2nd in their "Best Joey King TV Series" list, called it a "hit Disney show" and "delightful," while praising the performance of Joey King across the television series.^[67]

Accolades