Jimmy Fallon's Tonight Show is normally packed with celebrity guests, but it's not often one interrupts him mid-monologue to tell a joke.

In the clip above Fallon is running through a series of gags about how cold it is in New York City, when Mayor Zohran Mamdani suddenly appears next to the host to ask if he can "try one."

"It's so cold in New York City the rent froze itself," Mamdani says, nodding to his campaign promise of freezing rent for stabilised tenants. He then offered a serious message about the severe weather conditions. "But seriously, stay inside, stay warm, stay safe."