'Rick and Morty' Season 4 guest stars: Here's who voices each new character

Sam Neill, Kathleen Turner, and Jeffrey Wright are just some of the big names this season.

Rick and Morty Season 4 has quite a few surprises in store for fans, chief among them an exciting number of guest stars, some of which we don’t even know about until new episodes air. While the Kanye West episode won’t happen until Season 5 at the earliest, there’s still plenty more to get excited about, fPaul Giamatti to Elon Musk.

The show has already featured a staggering number of high-profile guest stars like Nathan Fillion, John Oliver, Werner Herzog, and many more in past seasons. It’s totally possible that some of them might return, but fans have every right to be excited for Season 4 characters voiced by actors like Liam Cunningham, Matthew Broderick, Taika Waititi, Sam Neill, and others.

Here’s an in-depth look at all the confirmed high-profile guest stars in Rick and Morty Season 4 that we know about, along with everything we know about the roles they might be playing — or are definitely playing — in Season 4:

rick and morty talking cat
Matthew Broderick's serene talking cat might be hiding a dark secret.

Matthew Broderick — Unnamed Talking Cat

During a SDCC interview with Kevin Smith for IMDb, Harmon and Roiland confirmed that Matthew Broderick was lending his vocal talents to Season 4, but they didn’t offer any specific details. Broderick wound up voicing the unnamed talking cat in “Claw and Hoarder: Special Ricktim’s Morty,” the fourth episode of Season 4.

While Morty gets a dragon and deals with the implications of that with help from Rick and Summer, in the B-plot Jerry encounters a mysterious talking cat in their home who requests Jerry fly him to Florida first class. Why Florida? “Because they don’t ask questions,” the cat says. “They play volleyball, they party, and they have fun.”

We later learn that this talking cat is hiding something deeply traumatic in his past, and he’s ashamed of whatever he did to gain the ability to speak. Read more about what this character could mean to the series.

In the episode’s post-credits scene, the cat befriends Morty’s abandoned dragon, so there’s every possibility that these two could show up again.

rick and morty dragon
Liam Cunningham voices a dragon named Balthromaw on 'Rick and Morty'.

Liam Cunningham — Balthromaw

The man who plays Ser Davos Seawoth, aka the Onion Knight from Game of Thrones, made his way into Rick and Morty for Season 4, Episode 4 in the form of a big red dragon named Balthromaw. Rick and Morty co-creators Dan Harmon and Justin Roiland confirmed actor Liam Cunningham for Season 4 during San Diego Comic Con in July 2019, and his episode aired December 8.

In it, Rick promises Morty a dragon if he helps out on one particularly deadly mission, which he’s forced to follow through on. Rick purchases one via a wizard from a different reality with magic rather than science, but after the dragon soul bonds with Rick instead, the wizards takes the dragon back, chastising it as a “slut.” That leaves Rick, Morty, and Summer to infiltrate that reality in the hopes they can rescue the dragon.

Cunningham moved from one magical fantasy story to another, and using his thick English accent to voice a dragon also reminds us of that time Sean Connery played a dragon in Dragonheart. This feels deliberate as the episode pokes fun at fantasy movies just like that on, along with Game of Thrones and Dungeons & Dragons in general. As mentioned previously, Balthromaw appears in the Episode 4 post-credits scene where he befriends the talking cat.

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Elon Tusk has a little bit nicer than Elon Musk.

Elon Musk — Elon Tusk

After Rick’s Heistotron robot tries to take over the universe via a convoluted heist plot in Season 4’s third episode, Rick assembles a random team of individuals from across the multiverse. One of them is “Elon Tusk,” a version of Elon Musk from a universe where everybody has big tusk-like teeth.

Billionaire founder of SpaceX and Tesla, Elon Musk, has a long and storied history as a fan of Rick and Morty, and his appearance in “One Crew Over the Crewcoo’s Morty” is the culmination of almost three years worth of speculation.

The real Musk first tweeted about his love for Rick and Morty in 2017 and met the show’s creators a few months later. He then wore a Rick and Morty shirt during a 2018 Tesla shareholder meeting. In February 2019, he co-hosted PewDiePie’s “Meme Review” with Rick and Morty co-creator Justin Roiland, leading many to believe that a cameo on the show felt inevitable. In May, Roiland accidentally teased that he recorded something with Musk, and now we know it was this extended cameo on the show that he must have recorded around the time that they did “Meme Review.”

rick and morty justin theroux
Miles Knightley is an arrogant heist artist that Rick one-ups.

Justin Theroux — Miles Knightley

Season 4, Episode 3, “One Crew Over the Crewcoo’s Morty” opens with Rick and Morty raiding an ancient tomb full of boobytraps to retrieve some kind of treasure, except someone has beaten then to it. Rick recognizes a paper crane as the signature move of Miles Knightley, a pompous pink-skinned heist artist who runs Heist Con, a professional and fan convention for people really into heists. He’s the antagonist for the first half of the episode before Rick’s Heistotron robot begins taking over the universe.

Knightley is voiced by Justin Theroux, former husband of Friends and The Morning Show star Jennifer Aniston. He’s best-recognized as the star of The Leftovers on HBO, but he’s had plenty of voice-acting roles in the video game Call of Duty: Modern Warfare 2, along with voicing a Decepticon in the Bumblebee Transformers movie and Tramp in Disney+’s live-action Lady and the Tramp.

rick and morty jeffrey wright tony
Jeffrey Wright appears as an alien named Tony who is a "bit of a shy pooper."

Jeffrey Wright — Tony

One of the more surprising additions to Rick and Morty’s second episode in Season 4 came with actor Jeffrey Wright voicing Tony, the alien who somehow managed to poop in Rick’s secret toilet in a remote, serene oasis. Rick spends the first half of the episode tracking Tony down based on very little evidence, and despite plans to kill Tony, Rick winds up sparing him — only to learn later that Tony died in a freak accident.

Tony is calm and depressed yet confident enough to stand up to Rick, saying that they’ll become fast friends even when Rick constantly threatens to kill him.

Wright is perhaps best-recognized as Bernard Lowe on Westworld, but he also has a role in the upcoming Batman movie as Commissioner Gordon. He’ll also provide the voice for The Watcher in Marvel Studios’ upcoming Disney+ series What If…?.

rick and morty glootie
Morty chokes out Glootie in the clip revealed at San Diego Comic-Con.

Taika Waititi — Glootie

Thor: Ragnarok director Taika Waititi (who also provides the voice and motion capture for Thor’s rocky friend Korg) was confirmed for Season 4 with a clip shown during San Diego Comic-Con that debuted his alien character Glootie, a plump little alien who’s into developing apps. He’s pink, has four eyes, white claws, and a tattoo stamped on his forehead that reads, “DO NOT DEVELOP MY APP.” (In one SDCC interview, Justin Roiland confirmed it was Rick Sanchez who tattooed this.)

In Episode 2, “The Old Man and the Seat,” Glootie appears as Rick’s intern. He coerces Jerry into helping him develop a dating app for humans on Earth to distract them while the command from the Mogonotron mothership plans to steal Earth’s water. Glootie has a change of heart in the end and helps Morty and Rick take the app down.

rick and morty sam neill
Sam Neill voices the leader of the Monogotrons.

Sam Neill — Monogotron Leader

As much as we’d all love for Sam Neill to riff on his iconic Jurassic Park role on Rick and Morty, he instead voices the leader of the Monogotrons.

“He’s from the same species as Taika’s character,” Roiland said of Neill’s role in an Entertainment Weekly interview in July, “and we wanted a Kiwi flavor to their species.” That’s definitely the case for Glootie and the other intern we hear speak in the episode, but Neill’s accent sounds more natural and less Kiwi.

Midway through Episode 2, his character reveals his grand plan to Morty and Jerry, but those plans are foiled when Glootie turns on him and shuts the app down.

rick and morty kathleen turner
Kathleen Turner voices the female leader of the Monogotrons.

Kathleen Turner — Monogotron Queen

Kathleen Turner has used her naturally sultry voice to play the animated Jessica Rabbit since 1988’s Who Framed Roger Rabbit, but she’s also done voice work for Family Guy and King of the Hill among many live-action roles.

Her character appears midway through Episode 2 as the partner to Sam Neill’s Monogotron leader. She’s never named outright, but she essentially functions as the queen of their species. The two are affectionate and seem devoted to one another for several minutes of screentime, but once Glootie successfully sabotages the Lovefinderrz app, they get in a hilarious shouting match that involves her calling him a “childish prick” and tons of other foul-mouthed curses.

bojack horseman paul giamtti
Paul Giamatti voiced himself in a 'BoJack Horsememan' Season 4 episode.

Paul Giamatti — ??

Rick and Morty co-creators Dan Harmon and Justin Roiland confirmed in May that while John Lithgow passed on a role, Paul Giamatti was cast in Season 4. That could be an indication that they were up for a similar role.

During an interview with IMDb held at SDCC, Roiland referred to Giamatti’s story as part of the “crazy train episode,” which will probably be Episode 4.

This note has us wishing that Rick and Morty Season 4 will riff on Snowpiercer in that there’s a train hurdling through an icy apocalypse that can never stop. Can Paul Giamatti be the overlord, or at least the conductor?

Rick and Morty Season 4 airs Sunday nights on Adult Swim at 11:30 p.m. Eastern.