Times Square will host a “sleep out” in December to raise money to combat homelessness as part of a global campaign, organizers announced on Tuesday.

Pedestrian plazas at the bustling tourist destination will be closed on Dec. 7 for the World’s Big Sleep Out event, and participants will pay to spend the night sleeping there outdoors.

“Men in Black” star Will Smith will “perform” a bedtime story to those braving the icy temperatures, according to the organization.

New York is one of more than 50 cities participating in the event on the same night.

“It doesn’t matter if you are taking part in Times Square or in your back garden with your family, by sleeping out for one night on December 7th we can simultaneously express our compassion for homeless people who have no other choice and raise life-saving funds to make a difference,” said World’s Big Sleep Out founder John Littlejohn in a statement.

Other cities participating include Chicago, Amsterdam and London — where Academy Award-winning actress Dame Helen Mirren will join sleeping activists in Trafalgar Square.

“The World’s Big Sleep Out campaign will play an important role in shining the political spotlight on the issues of homelessness and displacement whist raising considerable funds to make a big difference,” Mirren said in a statement.