Watch Prince Harry Charmingly Talk Deep Dish vs. Thin Crust Pizza in Chicago (Where Else?)

Deep dish or thin crust? Harry offers his royal weigh-in

First marshmallows. Now pizza.

After recently admitting he has never tried toasted marshmallows (blasphemy!), Prince Harry says he has sworn off another comfort food too (treachery!).

During a surprise visit on Tuesday to Hyde Park Academy, a Chicago high school, with his unofficial BFF (and the former First Lady) Michelle Obama, the students quizzed him on Chicago’s signature delicacy — and the exchange was captured in a video shared Thursday by Harry’s office at Kensington Palace.

“When Prince Harry’s here, he eats Chicago — make sure he has a pizza,” one student instructs him.

“I had pizza last night,” Harry replies. “I don’t even eat pizza anymore, but I had pizza last night.”

Christopher Dilts/The Obama Foundation

Asked if he tried deep-dish, he says, “We had deep-dish, and we had thin crust. I promise you, I will make sure I eat Chicago.”

During the visit to Hyde Park Academy, which is across the street from the future site of the Obama Presidential Center,“The warm and wide-ranging conversation, lasting over an hour, covered how the Obama Presidential Center will showcase the South Side of Chicago for a global audience, the importance of young people staying inspired and hopeful, and the transformative power of students using their voices to change the world,” said Caroline Adler Morales, the former first lady’s communications director.

Kensington Palace Twitter

Later that evening, Harry spoke movingly about his late mother, Princess Diana, at the Obama Foundation’s inaugural summit.

“I think she had a lot in common with everybody but also she certainly listened,” he said. “In a very, very short space of time she was like a vacuum going around, sucking up all the information, all the criticism, all the issues, all the positives and negatives from everybody, then putting her name and her platform toward the bigger issues that had never been talked about.

“In society we suffer from this illusion, or reality, that some problems become so big that nobody wants to get involved. She was the one that changed that. I will always look up to her … everything she did and the way she did it was having an impact, making a difference,” he said.