Joaquin Phoenix has joined PETA's campaign to 'end speciesism' and go vegan.
The Hollywood star has been a vegan since he was just three-years-old after he and his siblings saw 'fish being killed in a really violent and aggressive way'.
He's now thrown his support behind PETA's We Are All Animals campaign, which urges people to stop 'speciesism' and to live a vegan lifestyle.
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According to PETA, 'speciesism' is an oppressive belief that promotes the idea that all other animal species are inferior to humans - the animal organisation compares speciesism to 'sexism, racism, and other forms of discrimination'.
The Joker star said: "When we look at the world through another animal's eyes, we see that inside we're all the same-and that we all deserve to live free from suffering."
This isn't the first time Phoenix has worked alongside PETA, having previously supported campaigns against wool and one highlighting the suffering fish go through in their final moments.
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Phoenix has previously said the decision to go vegan was 'obvious' adding that he doesn't want to cause pain or suffering on other creatures.
Speaking to Brut earlier this year, he said: "I've been vegan since I was three years old and at that age me and my siblings witnessed fish being killed in a really violent and aggressive way.
"It was just absolutely obvious that that was something we didn't want to participate in and support. To me, it just seems obvious.
"I don't want to cause pain to another living, empathetic creature. I don't want to take its babies away from it, I don't want to force it to be indoors and fattened up just to be slaughtered.
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"It's absurd and barbaric and I just don't understand how you could witness that and not be affected by it."
He went on to say his veganism was 'one of the most important' things in his life.
"The effect that it has on our environment is devastating," he added. "So, for me it's just my life and it has always been my life. It's really one of the most important things to me."
However, despite his strong beliefs, Phoenix has said he has no plans to force his son to be a vegan.
Speaking to the Sunday Times he said: "Well, certainly I would hope that [he is vegan], but I'm not going to impose my belief on my child. I don't think that's right.
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"I'm going to educate him about the reality. I'm not going to indoctrinate him with the idea that McDonald's have a Happy Meal because there's nothing f***ing happy about that meal."
Featured Image Credit: Alamy