Now, he's a strong voice for the LGBTQ+ community, and is seemingly dating 13 Reasons Why star Brandon Flynn.
Chatting to The Sunday Times, he has opened up further about his gender identity.
“I don’t know what the title would be, but I feel just as much woman as I am man,” he explained.
He also revealed that he is obsessed with female clothing, "I love a heel - I've got loads of heels at home."
He continued, “People don’t know this, but when I was 17, I remember becoming obsessed with Boy George and Marilyn [Monroe], and all that. There was one moment in my life where I didn’t own a piece of male clothing, really. I would wear full makeup every day in school, eyelashes, leggings with Dr. Martens and huge fur coats, for 2.5 years.”
“I think [the new songs] show my growth, my confidence,” he explained. “I feel like they show me. They show the gay guy I’ve become.”