Two studies investigated whether performing green behaviors may influence people’s political attitudes regarding climate change. A survey study revealed that self-reported green behaviors indirectly predicted American participants’ political attitudes regarding climate change, and that this relationship was mediated by their green self-perceptions. This relationship was relatively stronger for conservatives than for liberals. An experimental study included two conditions: one which led people to perceive that they often performed green behaviors and another that led them to perceive that they failed to perform green behaviors. Political-orientation was found to moderate the effect of green behavior perceptions on ratings of the importance of climate-related issues and on support for emissions-reducing policies. Liberals reported greater importance and greater policy support when perceiving that they failed to act green, while conservatives did not. Implications for green behavior campaigns and their political spillover effects are discussed.