In marketing practice using celebrities (especially actors/actresses, sportsmen and sportswomen and popular models) is a very typical and widely used technic. Nowadays there is a general expectation from the society that celebrities have to make contribution to the solution of social and environmental problems. It is obvious that these actions also mean remarkable part of the PR activities of stars. But using celebrities in profit-oriented green communication is costly and risky at the same time, while “up and down”-s are very typical in their reputation. I have chosen two women, an actress/TV hostess and a model/TV hostess as an example, with which I would like to turn the attention to two crucial elements: question of credibility and potential areas of using celebrities as reference group.