![Image](https://cdn.statically.io/img/ew.com/thmb/gMKIKQbX3tZCZoOfCNHMsiyWFDo=/1500x0/filters:no_upscale():max_bytes(150000):strip_icc()/jon-hamm-1-05592184afa14fb08c6b8b4c7fda72df.jpg)
Jon Hamm is moving from Madison Avenue to Bikini Bottom. The Emmy-winning star of Mad Men landed a guest role on a future episode of SpongeBob SquarePants.
The ghost of Mad Men follows Hamm to the new subaquatic digs. Hamm will voice Don Grouper (sound familiar?), an ad exec who helps Mr. Krabs launch his frozen Krabby Patties line. He’s irresistible, smart, and well dressed. Take a look at a rough sketch of the character, who’s already smiling more than Draper.
WANT MORE EW? Subscribe now to keep up with the latest in movies, television and music.
![Image](https://ew.com/thmb/YQiwBQUb1QLmDYO4E5CMvXJsJwM=/1500x0/filters:no_upscale():max_bytes(150000):strip_icc()/dongrouper_approved-714dd788fc9a4cc29548ee9189631cd1.jpeg)
The episode is preliminarily slated to air in 2016, but the long-running Nickelodeon cartoon currently airs Fridays at 7:30 p.m. ET/PT.