The couple was on a lunch date at an East Village restaurant in NYC when they used the opportunity of being snapped to bring awareness to two charities close to them.
They did it holding up handwritten messages on pieces of cardboard in front of their faces, reported Radar Online.
"We just found out that there were paparazzi outside the restaurant we were eating in. So why not take this opportunity to bring attention to organizations that need and deserve it," they wrote followed by links to two charity websites, wwo.Org and gildasclubnyc.Org.
Gilda's Club New York City is the local branch of the support organization for people suffering from cancer. It's named after the late Gilda Radner who was one of the original cast members of Saturday Night Live.
Worldwide Orphans Foundation helps transform the lives of children without parents around the globe.
Stone, 23, and Garfield, 29, have been dating since meeting two years ago while working on their movie "The Amazing Spider-Man".