Noted for his long-running role as Homer Simpson on the animated television series The Simpsons, he voices many other characters on The Simpsons, including Abraham " Grampa " Simpson, Barney Gumble, Krusty the Clown, Groundskeeper Willie, Mayor Quimby and Hans Moleman.

Castellaneta also provides the voices for numerous other characters, including Grampa Simpson, Barney Gumble, Krusty the Clown, Groundskeeper Willie, Mayor Quimby, Hans Moleman, Sideshow Mel, Itchy, Kodos, the Squeaky Voiced Teen and Gil Gunderson.

Grampa's voice is performed by Dan Castellaneta, who also voices numerous other characters, including Homer Simpson, Krusty the Clown, Barney Gumble, Groundskeeper Willie, Mayor Quimby and Hans Moleman.

# REDIRECT Groundskeeper Willie

" In " The Joy of Sect ", the episode in which the whole town of Springfield is deceived into joining a cult, Lovejoy kidnaps Homer with Groundskeeper Willie from the cult and violently hits him across the head numerous times hoping to knock him out.

The Simpsons Character, Groundskeeper Willie is said to be from Kirkwall.

In the episode, The Simpsons and Groundskeeper Willie turn inside out, and then break into a song and dance number.

* Groundskeeper Willie

* The cartoon character Groundskeeper Willie is seen drinking a bottle of Buckfast in The Simpsons episode " Lisa Simpson, This Isn't Your Life ".

In the plot of the 1995 episode "' Round Springfield ", budget cuts at Springfield Elementary School force the janitor Groundskeeper Willie to become a French teacher.

Groundskeeper Willie is a recurring character on The Simpsons, voiced by Dan Castellaneta.

Groundskeeper Willie is the groundskeeper at Springfield Elementary School and is an angry Scotsman.

Groundskeeper Willie is an uncouth and unpleasant, though essentially harmless, character.

These contradictions are referenced in " The President Wore Pearls " when Groundskeeper Willie tells a story of working at a mine that caved in, saying, " No one made it out alive, not even Willie!

Groundskeeper Willie is depicted as being incompetent, quick to anger for little or no reason, slow-witted, and a heavy drinker.

Despite his antipathy towards Principal Skinner, Groundskeeper Willie is shown at times to be fiercely devoted to his job.

In " Lisa Gets an " A "", Groundskeeper Willie is shown gleefully plunging a severely clogged toilet with his own arm, and in " Bye Bye Nerdie ", he panics and rushes immediately to change a restroom towel dispenser that was nearly reaching its end.

As far as family, Groundskeeper Willie once told Principal Skinner that he had seen his own father being lynched for stealing a pig and, on another occasion, he expanded on his father's death, relating that his corpse had simply been thrown into a bog rather than receive a proper burial ( presumably in the aftermath of his sentence for pig theft ).

In " Lemon of Troy ", it is shown that the female groundskeeper at neighbouring Shelbyville Elementary School looks and speaks identically to Groundskeeper Willie.

Despite his usually gruff, unrefined mannerisms, on occasion Groundskeeper Willie has demonstrated gentlemanly behaviour.

He once came to the aid of wrongfully accused Homer Simpson ( in " Homer Badman "), where Groundskeeper Willie revealed that his pastimes included secretly videotaping couples.

" Not always a bachelor, Groundskeeper Willie was once engaged to Shary Bobbins as mentioned in " Simpsoncalifragilisticexpiala ( Annoyed Grunt ) cious ", until she recovered her eyesight ; at which point, in Groundskeeper Willie's words, " Suddenly the ugliest man in Glasgow wasn't good enough for her!

Groundskeeper Willie became Bart's teacher because, according to Principal Skinner, Groundskeeper Willie's shack is the only place on school grounds " outside all laws of Man and God.

" In season 19's " The Debarted ", it is revealed that Groundskeeper Willie uses his left arm for a diary and because of his lack of money he is forced to cut the words into his arm with a tattoo needle.

Groundskeeper Willie also works as a groundskeeper during summer vacation at the Springfield Glen Country Club, is a professional beekeeper, and also works as a janitor in Shelbyville.

According to Groundskeeper Willie, he is " too poor to have a last name ", although in the Simpsons Comics he is referred to as " William MacMoran ".

The 2009 episode " Lisa the Drama Queen " reveals that Groundskeeper Willie's full name is William MacDougal, and that he is a doctor.

A recurring joke, which was first shown in " Radio Bart ," is that Groundskeeper Willie appears to have a pot belly, but whenever he takes off his shirt, he is quite muscular.

One of Groundskeeper Willie's trademarks is a gruffly-spoken insulting retort, which take the writers a long time to come up with, although they do not consider them that funny.

After Groundskeeper Willie takes away Bart's skateboard for destroying his leaf pile, Bart fills up Willie's shack with creamed corn as he is sleeping, causing the shack to explode.

Against his will, Groundskeeper Willie is chosen to play the village idiot, and seeking revenge for his cruel treatment, Willie unleashes a pie with hundreds of rats inside.

Groundskeeper Willie's first appearance was in the season two episode " Principal Charming ".

Also, in this episode Principal Skinner gives Groundskeeper Willie an elementary school diploma for snitching on Bart.

Groundskeeper Willie's first appearance was in the season two episode " Principal Charming ".

In the episode, a snowstorm traps the students with principal Seymour Skinner and Groundskeeper Willie in Springfield Elementary.

When the kids try to leave school, however, snow has piled up, trapping the kids inside with Skinner and Groundskeeper Willie.

Groundskeeper Willie lends Skinner his sports car so he can go to Orlando, where he surprises Edna with a kiss under the fireworks display – until they are interrupted by Agnes, whom Skinner brought along, much to Edna's ire.

Marge tells him he has nothing to be afraid of -" except that fog that turns people inside out " when a creepy, mysterious green fog seeps through the window and the Simpsons are turned inside out ; they proceed to perform a bloody parody of A Chorus Lines song, " One " starring Willie the Groundskeeper over the end credits ending with Santa's Little Helper biting Bart and pulling him away from the screen.

The second segment, " Nightmare on Evergreen Terrace " is a parody of the A Nightmare on Elm Street film series, in which Groundskeeper Willie ( resembling Freddy Krueger ) attacks schoolchildren in their sleep.

It leads to Bart being forced to be taught by Groundskeeper Willie in his tool shed ( which smells like manure and has manure itself dripping on Bart ).

They are Homer, Bart, Lisa, Marge, Barney, Krusty, Apu, Groundskeeper Willie, Bumblebee Man, Moe, Ned Flanders, Professor Frink, Mr. Burns and Waylon Smithers, Kang and Kodos, Itchy, and Scratchy, some of which must be unlocked.