Conan O’Brien isn’t afraid to get silly with his guests, but one guest says she’s still holding on to a grudge from fifteen years ago after he almost destroyed her career with his antics.

Kate Mulgrew (Orange Is The New Black) and several of her co-stars appeared on a special episode of Conan this week, and the actress–who plays take-no-crap Red on the hit Netflix show–brought up the incident in which Conan made her dance.

“Fifteen years ago you almost destroyed my career. In front of millions, you forced me to perform an Irish jig! What goes around comes around. Now it’s your time to pay. Get up and do the dance,” Mulgrew said, before making Conan do a jig of his own.

O’Brien will participate in a huge event for The Simpsons‘ 25th anniversary later this year; the funnyman was a writer and producer for the longrunning cartoon for two years before he took over for David Letterman on Late Night. O’Brien will sing “The Monorail Song” from the episode “Marge Vs. The Monorail” and will be joined by the Gay Men’s Chorus of Los Angeles. The event takes place September 12-14th.

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