Simpsons creator Matt Groening will make a guest appearance on tonight’s episode of the IFC sketch comedy series Portlandia (10pm ET/PT). In the episode, Groening, who plays himself, files a lawsuit against angry bike messenger Spyke (Fred Armisen) over bootleg “Bart Ska-mpson” T-shirts.

The Portland-native Groening, who hasn’t acted since a walk-on cameo on The Tracey Ullman Show in 1988, told Entertainment Weekly that the most difficult part of the role was pretending to be upset by the shirt because he finds bootleg merchandise “hilarious” and would have been “delighted by a real-life Bart Ska-mpson t-shirt.”

Watch this clip from Groening’s appearance:

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