Classic TV is filled with sitcom actors who took on a side gig lending their voices to your favorite cartoons. Sometimes they’re emulating their iconic TV personas. However, in some cases, their voices are totally unrecognizable as their cartoon counterpart. So pour a bowl of your favorite sugary cereal and tune in for some of our favorite sitcom stars turned cartoon voice actors.

Dave Coulier, ‘Muppet Babies’

Jim Henson’s Muppet Babies ran on Saturday mornings on CBS from 1984 to 1991. It featured toddler versions of the Kermit, Miss Piggy, and company having elaborate adventures using only their imaginations. One of the break-out characters was Animal, the youngest and most manic of the babies.

Dave Coulier, Uncle Jesse himself from Full House, voiced Animal in “Muppet Babies” for the entire series. He took on the role before becoming famous and continued voicing Animal until the show ended. Coulier also provided voices for other beloved characters like Baby Bunsen, Baby Janice, Camilla, and Baby Bean Bunny. He also voiced another classic TV favorite as Peter Venkman in The Real Ghostbusters cartoon from season three onwards.

James Avery, ‘Teenage Mutant Ninja Turtles’

James Avery was a father figure to 90s kids everywhere as Uncle Phil on The Fresh Prince of Bel-Air. However, he also voiced the arch-nemesis to the Teenage Mutant Ninja Turtles in their original cartoon. Avery voiced Oroku “The Shredder” Saki from 1987 to 1993 for a total of 106 episodes. He got a kick out of it when fans of the gruff but loveable Uncle Phil realized he was also the sinister Shredder. Avery continued to be a prolific voice actor in cartoons and video games until his untimely death in 2013.

John Ritter, ‘Clifford the Big Red Dog’

John Ritter is a beloved classic TV star, from Three’s Company to 8 Simple Rules. He also had a diverse film career, leading films like Problem Child and giving solid supporting turns in films like Sling Blade. However, kids who grew up in the ’90s know him best as the voice of the title character on the PBS kid’s series Clifford the Big Red Dog.

From 2000 until his sudden death on September 11th, 2003, due to cardiac issues, Ritter voiced the lovable red canine in 64 episodes of the educational show. The series followed Clifford’s adventures on Birdwell Island with his companions Cleo and T-Bone, as well as his adoring owner, eight-year-old Emily Elizabeth. Despite Ritter’s passing, he had already completed the voice work for Clifford’s first feature film, Clifford’s Really Big Movie. The film premiered in 2004 and was dedicated to his memory.

Classic TV’s Favorite Nerd Voices a Video Game Cartoon… Jaleel White, ‘Adventures of Sonic the Hedgehog’

That’s right, Urkel himself, Jaleel White, voiced the iconic video game character Sonic the Hedgehog in a few different cartoons. White shot to fame as the annoying nerdy neighbor and fan favorite Steve Urkel in the classic TV sitcom Family Matters. Over the years, White voiced Sonic in various animated TV shows, such as Adventures of Sonic the Hedgehog (1993), Sonic the Hedgehog (1993-1994), and Sonic Underground (1999).

He also portrayed Sonic’s siblings, Manic and Sonia, in the short-lived Sonic Underground series. In the video below, White explains that because of his Urkel fame, his voicing Sonic was a huge selling point in making the cartoon happen.

Don Adams, ‘Inspector Gadget’  

Don Adams brought the laughs as secret agent Maxwell Smart in the sitcom Get Smart from 1965-1970. Created by Mel Brooks and Buck Henry, the show cleverly parodied high-tech gadgets from NBC’s Man from U.N.C.L.E., showcasing Adams’ comedic talent and endless humor possibilities.

From 1983 to 1985, Adams lent his voice to the beloved character of Inspector Gadget. This crime-solving cyborg was equipped with a plethora of snap-on attachments and an astonishing array of gizmos. The animated series spanned three seasons and continued to captivate audiences in syndication for years. In 1996, Adams reprised his role as Gadget for the Canadian travel show Field Trip Starring Inspector Gadget.