Martha Plimpton and River Phoenix and joaquin phoenix

martha 'became a vegetarian as a teen after late boyfriend, River Phoenix, introduced her'

source: http://www.imdb.com/name/nm0000588/bio

joaquin 'is a member of P.E.T.A. and the organization In Defense of Animals, and has actively campaigned on their behalf.[21] He narrated the film Earthlings for Nation Earth, a video about the investigation of animal abuse in factory farms, pet mills, in industry and research.'

source: http://en.wikipedia.org/wiki/Joaquin_Phoenix