IT’S among the most exclusive lists in all of Hollywood – harder to get into than the “naughty” section in Wilmer Valderrama’s black book.

It’s “The Simpsons” guest star list, a record kept by the producers of all the famous names who are practically begging to do a guest voice on the series. And even though the animated sitcom is heading into its 19th season, it evidently still has a very, very long list of famous fans.

So who’s on it, you wonder? “The Simpsons” staff is mum.

“They usually come up to you privately and let you know [they’d like to do the show], so we keep it that way and hope we find a part for them someday,” says producer/ writer Mike Scully.

Among those who probably resided on the list until recently are the just-announced guest stars for next season, including Jack Black, Lionel Richie, Dan Rather and Stephen Colbert. “The Simpsons Movie,” opening Friday, also has its own crop of guest voices, including Green Day and a surprise, top-secret cameo from a star who usually collects $20 million just to get out of bed. Yet even he was impressed.

“Some people come to record, and you can’t imagine they’d be intimidated by us, but they kind of are,” says Yeardley Smith, the voice of Lisa.

“Everybody gets the same fee,” says director John Waters, who guest-starred as a gay man who befriends Homer. “I would never tell you how much I made, but I didn’t do it for the money. It was fame maintenance in the best sort of way. I was really flattered to be asked.”

Though not everybody who wants to be on the show will eventually be rendered in glorious yellow. “We’re very careful about guest stars. We try never to just throw a celebrity in for the sake of having them. We try to match them with a part,” says Al Jean, producer and writer for both the show and the movie.

Some favorite memories:

“The highest percentage of guest stars is us saying, ‘Here’s someone we’d love to meet.’ Stephen Hawking or Thomas Pynchon. We figured if we’d like to meet them, then the audience would like to meet them through the show. And not everyone is so cerebral. We had Mr. T, and that was really fun.” – Al Jean

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“Some celebrities are not great actors, so what we do is take advantage of that. We write lines that are purposely awkward, so it then sounds hilarious coming out of their mouths. A great example of that is when we had James Brown, where he’s playing on a bandstand. James is a great entertainer, but he’s not going to be the greatest actor in the world, and sometimes he did get a bit of stiffness in there. But we gave him these incredibly hilarious, stiff lines that killed. He’d say, ‘Wait a minute. The bandstand wasn’t double-bolted,’ which is a horrible, horrible line. But mix that with his reading and you have something that just sounds perfectly wrong and it makes it funny.” -David Mirkin

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“We haven’t asked a current president, but we’ve asked every other president going back to Nixon, and they all said no.” – Al Jean

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“There are children who come up to me with that Simpsons book to sign, and they have no idea about anything else I’ve ever done. More people probably saw that episode of ‘The Simpsons’ than all my movies put together. I thoroughly enjoyed doing it. And of course, I did tell [the animators] that if I ended up looking like Richard Simmons, I’d kill them.” – John Waters

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“Michael Jackson came in, which was fascinating. He was very shy. This was ages ago [in 1991], and he wasn’t credited as doing the voice. In that episode, there’s a big, fat white guy. I think he’s in a mental institution, and Michael did that voice. But then there’s a song he sings, ‘Lisa, It’s Your Birthday,’ and he had to contractually handpick somebody who sounded like him to sing it. There was a gag order. We weren’t allowed to even say he was in the show. But the word’s out.” – Yeardley “Lisa” Smith

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“Eric Idle came into the writer’s room once and said he’d like to be on the show. He’s great, but we didn’t have anything for him. Later, somebody pitched an idea where a documentary filmmaker came to the elementary school. We thought, that’s perfect. He can be a little bit like Michael Apted. There was a two-year lapse, but we finally put him on.” -Al Jean

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Elizabeth Taylor, who said Maggie’s first word, “Daddy,” reportedly stormed out of the recording session after 24 takes when creator Matt Groening kept directing her to tone down the sexiness of her voice.

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“We had had Ringo Starr and George Harrison on the show, but Paul McCartney was elusive. I was going through a situation when I was becoming a vegetarian, and that inspired a story that David Cohen had pitched about Lisa becoming a vegetarian. I thought this was a great way to get McCartney, because he and his [then-] wife Linda could not be more into animal rights and vegetarianism. They were not able to say no. I flew to London and went up to his home in Sussex, and it was right when The Beatles were reuniting [for the Anthology series in 1995]. I got to spend time with him in his studio, and that was one of the most amazing experiences in my life. He gives you the tour. He says, ‘Hey, David, remember the song “Because”? This is the harpsichord.’ And he goes, ‘These are the chimes from “Penny Lane.” ‘ And he has Elvis’ bass, and he played that.” – David Mirkin

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“When we had Mick Jagger on [in season 14], his manager came to me before the recording session and said, ‘Mick would like to speak to you in the green room.’ I walked in and it was just Mick, sitting on a couch reading the script. I sat down, and I remember so vividly on the outside trying to project the cool, calm demeanor, but on the inside feeling like a 12-year-old girl going, ‘Oh, my God! It’s Mick Jagger!’ He went through the script and pointed out a lot of jokes that he liked and only asked us to change the wording on one line. It wasn’t wording that he would use.” – Mike Scully

More than 40 athletes have guest starred, including figure skater Michelle Kwan, NBA players Yao Ming and LeBron James, and footballers Warren Sapp and Tom Brady, who all appeared in a post-Super Bowl episode in season 16. James – who nearly won a freakin’ NBA championship last season – told the San Jose Mercury News that the animated cameo was “one of the best things I’ve done.” Yao thought the script was funny, even though he’s not too familiar with the show, because it’s banned from prime time in China. And Kwan said, “When my brother saw [the show], he said, ‘Now you’ve finally made it.’ ” Guest stars walk away from the recording with a gift bag loaded with “The Simpsons” merchandise, including a leather jacket adorned with character patches and a TV tray. Kwan says her gift bag remains wrapped, and jokes that one day she’ll sell it for a million dollars.