Daniel Louis " Dan " Castellaneta ( born October 29, 1957 ) is an American actor, voice actor, comedian and screenwriter.

To perform Homer's voice, Castellaneta lowers his chin to his chest, and is said to " let his IQ go.

Despite Homer's fame, Castellaneta claims he is rarely recognized in public, " except, maybe, by a die-hard fan.

Castellaneta is also credited as a consulting producer.

Castellaneta chose the title I Am Not Homer as a parody of Leonard Nimoy's famous first autobiography I Am Not Spock, as well as to show that most of the comedy featured " is not the typical Homer comedy.

He is voiced by Dan Castellaneta and first appeared on television, along with the rest of his family, in The Tracey Ullman Show short " Good Night " on April 19, 1987.

He is voiced by Dan Castellaneta and he is also the patriarch of the Simpson family, the father of Homer Simpson, and the grandfather of Bart, Lisa, and Maggie Simpson.

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.

Castellaneta said it is hard for him to do Grampa's voice because it is " wheezy and airy ".

He is voiced by Dan Castellaneta, and first appeared in the episode " Principal Charming ".

He is voiced by Dan Castellaneta.

He is voiced by Dan Castellaneta, and first appeared in the episode " The Call of the Simpsons ".

The character is voiced by Dan Castellaneta and first appeared in the series premiere episode " Simpsons Roasting on an Open Fire ".

Barney Gumble is voiced by Dan Castellaneta.

Castellaneta has voiced Barney every time he has appeared in the series, with the exception of the episode " Homer's Barbershop Quartet ", in which some of Barney's singing is provided by a member of The Dapper Dans, who recorded lines for all four members of the Be Sharps.

* Megavolt ( voiced by Dan Castellaneta )-Elmo Sputterspark is a rat and was a high school nerd who gained the power to control electricity when one of his experiments was sabotaged.

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

Ginny Tillman, the ex-wife of a Beverly Hills proctologist ; Francesca McDowell, a 14-year-old New York City girl being raised by her father Dave ( portrayed by Castellaneta ) and his partner William ( McMurray ); Tina, a Brooklyn postal employee who is best friends with her co-worker Meg ( Kavner ); Sarah Downey, a quintessential yuppie married to attorney Greg ( Castellaneta ); Kay Clark, an English office worker and caregiver to her sick mother ( Kay also appeared frequently in Tracey Takes On ); Sandra Decker, an aged Hollywood movie actress ; Kiki Howard-Smith, an Australian professional golfer ; Summer Storm, a Los Angeles disc jockey ; and Angel Tish, a singer who appeared with her husband Marty ( Castellaneta ).

* Mr Thickly ( Dan Castellaneta ) – A multitalented and upbeat wallaby who works at the Hotel Tazmania, although his exact job title is unspecified.

On the way to the bus station, Olive runs into an evil mailman ( voiced by Dan Castellaneta ) who is fed up with the stress of having to deliver the heavy loads of mail during the Christmas rush.

Although cast member Dan Castellaneta occasionally voiced Santa's Little Helper for bit parts, American voice artist Frank Welker most often provided the sounds of the dog and other animals on the show from " Bart's Dog Gets an F ", which aired on March 7, 1991, to " Home Sweet Homediddly-Dum-Doodily ", which aired on October 1, 1995.

* Krunk ( voiced by Dan Castellaneta )-Krunk is the Head Engineer for the Droid rebellion, and is Alloy's most reliable companion.

Each commercial ended with a pun on the famous tagline " You can't say no " with Dan Castellaneta saying " CC's-you can't say ..." and then Homer would say D ' oh !.

Voices were needed for the shorts, so the producers decided to ask Kavner and fellow cast member Dan Castellaneta to voice Marge and Homer rather than hire more actors.

In 2004, Kavner and Dan Castellaneta ( the voice of Homer ) won a Young Artist Award for " Most Popular Mom & Dad in a TV Series ".

Voices were needed for the shorts, so the producers decided to ask Castellaneta to voice Homer.

Castellaneta has won four Primetime Emmy Awards for Outstanding Voice-Over Performance for his work on the show as well as an Annie Award for Outstanding Individual Achievement in the Field of Animation in 1993.

Voices were needed for the shorts, so the producers decided to ask Castellaneta and fellow cast member Julie Kavner to voice Homer and Marge Simpson rather than hire more actors.

Homer's voice began as a loose impression of Walter Matthau, but Castellaneta could not " get enough power behind that voice " and could not sustain his Matthau impression for the nine to ten hour long recording sessions.

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.

The episode script did not call for Quimby to be a parody of them, and Castellaneta improvised the accent.

Castellaneta has won several awards for voicing Homer, including four Primetime Emmy Awards for " Outstanding Voice-Over Performance " in 1992 for " Lisa's Pony ", 1993 for " Mr. Plow ", 2004 for voicing several characters in " Today I Am a Clown ", and 2009 for voicing Homer in " Father Knows Worst ".

In 1993, Castellaneta was given a special Annie Award, " Outstanding Individual Achievement in the Field of Animation ", for his work as Homer on The Simpsons.

In 2004, Castellaneta and Julie Kavner ( the voice of Marge ) won a Young Artist Award for " Most Popular Mom & Dad in a TV Series ".

In the early 1990s, Castellaneta and Deb Lacusta wrote a script for an episode in which Barney becomes sober.

For voicing Homer, Castellaneta has won four Primetime Emmy Awards for Outstanding Voice-Over Performance and a special-achievement Annie Award.

While the roles of Homer and Marge were given to Dan Castellaneta and Julie Kavner because they were already a part of the Tracey Ullman Show cast, the producers decided to hold casting for the roles of Bart and Lisa.

Sexual Inadequacy " ( season six, 1994 ) featured many interactions between Grampa and Homer, so Castellaneta therefore had to talk to himself when he recorded the voices for that episode.

" Dan Castellaneta has won two Primetime Emmy Awards in the Outstanding Voice-Over Performance category for voicing various characters, including Grampa.

Dan Castellaneta had actually recorded all the dialogue of the Genie for this film, as he did with the previous sequel due to Disney's differences with Williams, but his recording session was not used when Robin Williams agreed to reprise his role.

He's a guest character from his own series of games and Dan Castellaneta reprises his role from the cartoon series.

Many of the films ' stars provided the voices of their TV counterparts, with the notable exception of Dan Castellaneta filling in for Robin Williams in the Genie role ( like in The Return of Jafar ).