The "Zoolander" star was snapped feeding the hungry at a shelter in Brooklyn on Friday and seemed shy to be found out.
Stiller, dressed in a neon reflective volunteer jacket, was serving up pancakes, bacon and eggs to the hungry New Yorkers who had lost their homes or had no power after Sandy ripped through the city.
Stiller, who lives in the city, has also been calling for donations to the clean-up via his Twitter page, reported Daily Mail.
The cyclone struck the Big Apple on October 29, destroying thousands of homes and leaving millions of people without power.