Leonardo DiCaprio is paying tribute to a fellow environmentalist, his friend and colleague Jane Goodall , who died Wednesday .

Goodall, 91, was in Los Angeles to give a talk at UCLA.

“Today we have lost a true hero for the planet, an inspiration to millions, and a dear friend,” the actor and activist wrote on Instagram.

“Jane Goodall devoted her life to protecting our planet and giving a voice to the wild animals and the ecosystems they inhabit,” he continued. “Her groundbreaking research on chimpanzees in Tanzania transformed our understanding of how our closest relatives live, socialize, and think — reminding us that we are deeply connected not only to chimpanzees and the other great apes, but to all life.”

“For decades, Jane traveled the world with tireless energy, awakening ge

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