Conan O’Brien will appear as a special guest on the season 36 premiere of The Simpsons this Sunday, September 29th, marking a homecoming for the comedian, who wrote for the show during its early seasons.

O’Brien hyped the appearance on Twitter on Saturday, writing, “I’m finally back on The Simpsons this Sunday with a mind-blowing episode that has been 36 years in the making. I can’t imagine a bigger national event in the next five weeks.”

Following a stint on Saturday Night Live in the late 1980s, O’Brien joined The Simpsons writing staff in 1991. During his two-year run on the show, he wrote several notable episodes, including “Marge vs. the Monorail,” “New Kid on the Block,” and “Homer Goes to College.”

Sunday’s appearance will mark O’Brien’s first time on The Simpsons since he made a cameo during season 5 in 1994, shortly after he landed the gig as host of NBC’s Late Night. More recently, he appeared alongside Homer in a segment that aired during the final week of his TBS’s late night show in 2021.

Past seasons of The Simpsons are available to stream on Disney+.

Earlier this year, O’Brien stole the show at the 2024 Newport Folk Fest with a star-studded superjam that included a guest appearance from Jack White. His Max travel series, Conan O’Brien Must Go, was also recently renewed for a second season.

I’m finally back on The Simpsons this Sunday with a mind-blowing episode that has been 36 years in the making. I can’t imagine a bigger national event in the next five weeks.

— Conan O’Brien (@ConanOBrien) September 28, 2024