Brad Pitt

Brad Pitt has been a vegan for quite awhile, not only because of the health benefits to his own body but because of the negative effects of raising livestock on the environment. Cattle produce organic waste that releases huge amounts of methane into the atmosphere, which experts say is a leading cause of climate change. However, it's believed Brad's diet may have been one cause of the rift in his family, because Angelina Jolie is not vegan and won't allow her children to give up meat or dairy.