1 of 3 | Dr. Jane Goodall, UN Messenger of Peace and founder of The Jane Goodall Institute, died Wednesday at the age of 91. File Photo by John Angelillo/UPI | License PhotoOct. 2 (UPI) -- Oscar-winning actor Leonardo DiCaprio is paying tribute to his "dear friend" Jane Goodall, a primatologist and conservationist he described as "a true hero for the planet" and "an inspiration to millions." "Jane Goodall devoted her life to protecting our planet and giving a voice to the wild animals and the ecosystems they inhabit," DiCaprio wrote on Instagram. The actor offered his deepest condolences to Goodall's family and urged people to support The Jane Goodall Institute and other conservation groups she cared about. Jane Goodall speaks at Forbes Sustainability Leaders Summit