Just like past winners Audrey Hepburn, John Gielgud, and Ingrid Bergman before him, Jon Hamm is making the traditional post-Emmys stop by SpongeBob SquarePants. Nickelodeon tells Vulture that Hamm’s signed on to voice a character named Don Grouper in the animated series in an episode airing sometime next year; Grouper, if you couldn’t guess, is “a charismatic head ad executive†with a “sharp mind and devastating charm.†(Nick also provided a rough character sketch, which you can see above.) In Hamm’s episode, SpongeBob and Mr. Krabs go to Grouper for business advice — no word on whether they say thank you, or if that’s what the Krabby Patty is for.