Jimmy Fallon to swim Polar Plunge in Chicago

Jimmy Fallon is getting ready to do the Polar Plunge, Chicago-style with Mayor Rahm Emanuel.

The new host of “The Tonight Show” said Monday on Twitter that he would join Emanuel for the frigid swim on Sunday in Lake Michigan. His decision came after Emanuel said he would appear on “The Tonight Show” if Fallon joined him for the event benefiting Special Olympics.

Okay @RahmEmanuel I’m in. Lake Michigan will have a New York fish this weekend. #SwimmyFallon

— jimmy fallon (@jimmyfallon) February 24, 2014

Chicago – I’m wearing a suit and tie for the #PolarPlunge. Show solidarity by wearing a necktie. (I’m not telling you what else to wear.)

— jimmy fallon (@jimmyfallon) February 24, 2014