Alan Cumming and Dee Hilfiger accidentally ate dirt at a swanky party at the site of the original J.P. Morgan Bank on Wall Street.

Tuesday’s event, thrown for the upcoming 14th Factory exhibition, included a 10-course dinner designed by famed Cophenhagen, Denmark, restaurant Noma that included sea urchin toast, black garlic flower and a dessert of fried moss covered in chocolate, placed on what diners thought was a bed of potted grass and edible dirt.

“Dee said she’d had a similar dish in Copenhagen where you’re supposed to eat the entire presentation,” says a source. “Dee and Alan ate the edible parts and just kept going. They burst into hysterics when they realized the grass and dirt were real.”

Tommy Hilfiger, Julia Ormond and Jeffrey Deitch also attended.

This article originally appeared in the New York Post's Page Six.