Lincoln has the show's record of having the most English voice actors in the cast: Sean Ryan Fox in the 2014 pilot, Grant Palmer from "Left in the Dark" to "A Fair to Remember", Collin Dean from "One of the Boys" to "House of Lies" (with Jackson Petty as his singing voice in "Really Loud Music"), Tex Hammond from "Game Boys" to "Room and Hoard", Asher Bishop from "Wheel and Deal" to "Flip This Flip", Bentley Griffin from "Save Royal Woods!" to "Can't Lynn Them All", and Sawyer Cole from "One in a Million" onwards.
Grey DeLisle briefly voiced child Lynn Sr. in "Home of the Fave", but from "Recipe for Disaster", he's been voiced by Brian Stepanek, who voices his present-day counterpart.
The Bratty Kid's mom was voiced by Cristina Pucelli in "Cereal Offender" and by April Stewart in "Funny Business".
Clyde has been voiced by Caleel Harris from "Left in the Dark" to "Teacher's Union", Andre Robinson from "Head Poet's Anxiety" to "Frame on You", Jahzir Bruno (who also plays him in live-action) from "Present Danger" to "A Stella Performance", and Jaeden White from "An Orchid Grief" onwards.
Ronnie Anne has been voiced by Breanna Yde from "Save the Date" to "The Loudest Thanksgiving" and by Izabella Alvarez from "Friended!" onward.
Pam Fox has been voiced by Grey Griffin in "Breaking Dad" and by Catherine Taber from "Sitting Bull" onward.
Minor character Lance has had three voice actors: Jay Gragnani in "Making the Case", Juliocesar Chavez in "The Green House", and Tex Hammondnote Lincoln's third voice actor in Season 3.
Around the end of Season 3, some minor or recurring characters that were previously voiced by some of the regular cast members were recast with separate voice actors new to the series as they were given expanded roles:
Lynn's friend Margo was voiced by Lara Jill Miller up until "Friendzy", and by Brec Bassinger from "Hero Today, Gone Tomorrow" onwards.
Luna's crush Sam was voiced by Jill Talley in "L is for Love", and Alyson Stoner from "Racing Hearts" onwards. Stoner is also LGBT and a musician, making their casting an Actor-Shared Background.
Luan's crush Benny was voiced by Jessica DiCicco in "L is for Love", and Sean Giambrone from "Stage Plight" onwards.
Rusty was voiced by Wyatt Griswold from "Hand-Me-Downer" to "Friends in Dry Places", Owen Rivera-Babbey from "Schooled!" to "Rumor Has It", and Diego Alexander from "Grub Snub" onwards.
Fred Willard voiced Pop Pop from Seasons 1-4 before his death. Afterwards, Christopher Swindle briefly filled in for "Resident Upheaval", and Piotr Michael permanently took over from "High Crimes" onward".
Harold McBride has been voiced by Wayne Brady from "Overnight Success" to "Cat-astrophe", and by Khary Payton from "An Orchid Grief" onwards.
Arturo Santiago is primarily voiced by Eugenio Derbez. However, in "Day of the Dead", he is instead voiced by Fabio Tassone, presumably because Derbez got in an accident that required him to get surgery, preventing him from recording his lines.
Starting with "Operation Dad", Carlitos is voiced by Cristina Milizia instead of Roxana Ortega.
Sameer has been voiced by Makana Say from The Loud House up until the The Casagrandes episode "Team Effort", Nour Jude Assaf from "Blunder Party" to "Zoo-mergency!", Jacob Lukose from "Throwing Pains" to "Skatey Cat", and Aryan Simhadri from "The Wurst Job" onwards.
Likewise, Nika Futterman voiced Alexis Flores until Season 2, where she stepped down from the role as a result of the George Floyd protests and was thus replaced by Diego Olmedo (a young Latino boy). Afterwards, Connor Andrade replaced him due to Olmedo undergoing puberty during Season 3.
August Michael Peterson and Emily Ford replace Charlotte Ann Tucker and Lainey Jane Knowles as Lily.
Jolie Jenkins replaces Muretta Moss as Rita. This overlaps with The Other Marty, as Moss was originally slated to reprise her role.
Miles Burris replaces Brian Patrick Wade as Rip Hardcore.
Ray Ford replaces Marcus Folmar as Harold.
Stephen Guarino replaces Justin Michael Stevenson as Howard.
Damian Alonso replaces Matt Van Smith as Bobby.
During Mr. Grouse's Voice-Only Cameo in "Ro-Bro", he's voiced by John DiMaggio. When he shows up in person in "Spelling and Doorbelling", he's played by Peter Breitmayer.
Rita was voiced by Katia Follesa, who is more known as a comedian than a voice actress, in the first 13 episodes. Starting from the fourteenth episode, she is voiced by Lucia Valenti.
In Season 1, Rusty Spokes was voiced by Tania De Domenico, Liam by Annalisa Longo and Zach by Gianandrea Muià. From Season 2 onwards, the three voices were swapped around, so now Muià voices Rusty, De Domenico voices Liam and Longo voices Zach.
In the Hungarian dub, Lori's and Lynn's voice actresses were switched around beginning from episode 13 of Season 1. No, not replaced by new actors, just swapped, leading to both of them sounding incredibly off.
Due to Andrea Arruti's death, Sid eventually went on to be dubbed by Regina Ruiz from "Operation Dad" in the Latin American dub.
In the Italian dub, Ronnie Anne is voiced by Giulia Bersani instead of Tiziana Martello, who voiced her in The Loud House up until the five "...with the Casagrandes" episode.
Mieczysław Morański, the Polish voice actor of Vito Filiponio and Mr. Scully, died of COVID-19 on December 27, 2020. Since then, Jarosław Domin has voiced Vito and Aleksander Mikołajczak has voiced Scully.
While most of the cartoon cast reprises their roles in the Italian dub, Lily is voiced by Sofia Fronzi instead of Giada Bonanomi, while Howard is voiced by Alessandro Germano instead of Marco Benedetti.
While most of the cast reprises their roles from the cartoon and A Loud House Christmas, Lincoln is voiced by Sebastiano Tamburrini instead of Alessio De Filippis and Clyde is voiced by Lorenzo Briganti instead of Andrea Rotolo.
The Dutch dub replaces the voices of all the sisters with a new cast. Vita Coenen, who voices Luan in the animated series, voices Lori instead of Barbara Sloesen.
