It may have taken 25 years, but Judd Apatow’s spec script for “The Simpsons” is finally getting made into an episode.

When Apatow was first trying to break into the TV world back in 1990, he wrote a spec script after only six episodes of “The Simpsons” had aired. In the episode, Homer gets hypnotized, thinks he’s a 10-year-old and doesn’t want to go back to adult live. Apatow has frequently said that everything he’s written since has been based off his “Simpsons” idea. “I have always been fascinated with how difficult it is to grow up,” he told TV Guide in a recent interview.

The “Girls” executive producer told the site that the episode, titled “Bart’s New Friend,” won’t be exactly what he wrote as a 22-year-old. “It’s a pretty rough script — when I reread it I wasn’t exactly glowing with pride,” he said. But the “Simpsons” gang, including Dan Castellaneta, Julie Kavner, Nancy Cartwright and Yeardley Smith, added their touches to the script during a table read. “Putting their brilliant spin on something I wrote back when I was a dreamer, was one of the greatest days of my life. These are legends!”

Last January, Apatow also got to voice himself on an episode of “The Simpsons.” At the time he told EW, “There is a small part of me that thinks I should retire. There’s nothing else to dream for.” With his “Simpsons” episode finally airing on Jan. 11 — the same day “Girls” Season 4 returns — Apatow’s bucket list seems pretty near complete.

For more, head to TV Guide.

“The Simpsons” airs on Sundays at 8:00 p.m. ET on Fox.