In 2017, Hamilton told the BBC that he had become vegan because, "the human race, what we are doing to the world... the pollution [in terms of emissions of global-warming gases coming from the amount of cows that are being produced is incredible. The cruelty is horrible and I don't necessarily want to support that and I want to live a healthier life." In 2018 he was named the PETA 'Person of the Year' for his vegan activism. In 2018, Hamilton said in an interview that he gave up drinking "a while ago".