Joaquin Phoenix

A three-year-old Joaquin Phoenix and his three siblings all became vegans during a family fishing trip. "We literally screamed at our parents and said 'We'll never eat meat again'...they were throwing fish against the side of the boat in order to kill them...it was undeniable that it was brutal, barbaric and horrible for us, and so we said that," the Oscar nominee and PETA spokesperson recalled. He has been a steadfast vegan ever since, even refusing to wear leather sandals for his turn as Emperor Commodus in Gladiator.