Turns out Harry Styles' fans weren't the only ones deeply affected by his dramatic haircut last year. The 23-year-old pop star debuted his new solo single, "Sign of the Times," on BBC's Radio One on Friday, and opened up about his projects since leaving One Direction.
For his first film project, Styles will be appearing in Christopher Nolan's upcoming war drama, Dunkirk, and while the role is very prestigious, he had to make one big sacrifice -- his signature long hair.
MORE: Listen to Harry Styles' Debut Solo Single 'Sign of the Times'
"I felt very naked for a while, a little bit," he admitted on the radio show. "I was super excited to kind of be involved. I'm a massive fan of his movies. I thought it was a really cool project, and I really wanted to be involved in it."
So what happened to Harry's luscious locks?
"It got made into a wig," he revealed of donating his hair to a cancer charity in the UK.
Styles went on to dish about his love life, or lack there of, during his time out of the spotlight.
"I haven't dated in a long time because I went away to do the movie and then I did the album," he noted.
When asked about his "worst trait," Styles replied, "I think I snore. But also, I quite like routine. I'm not really spontaneous."
While he may not be spontaneous -- though he does tend to suspend himself off helicopters in mid-air -- Styles does have plenty of famous friends to brag about. In fact, he got a rather hilarious 21st birthday gift from Adele.
"For my 21st she gave me one of her albums, 21, she said, 'I did some pretty cool stuff when I was 21, good luck,'" Styles recalled laughing. "I was like, 'Geez.' No pressure."
Noting that his favorite Adele song from her new album is "Sweetest Devotion," Styles gushed about the pop superstar, saying, "I've spoken to her a little bit, but I don't think so much for advice. For her, I like how she does stuff. She leads by example, she's the biggest, she's amazing… she's just good at it. I like how she does everything. I think it always looks very nice."
He's also a big fan of his pal Ed Sheeran, who listened to some of his album before its release.
WATCH: Harry Styles Officially Goes Solo, Shares Single Art and Release Date Ahead of 'SNL' Performance
"He liked one [song] that wasn't on [the album], so I had a moment," Styles admitted of his doubts about his song list. "I just think he's really good. He's one of the most talented dudes I know."
As for his mellow, classic rock-style single "Sign of the Times," Styles hopes it will be a big hit.
"I like it so I hope people like it," he said. "It's the song I'm most proud of writing, I think."
Styles is set to perform the song on Saturday Night Live on April 15 and the music video will be out later this month.
For more from the filming the music video, watch the clip below!