Taron Egerton has said he found it "liberating" to shave his head after he split up with his girlfriend.
The Kingsman actor, who had been in a relationship with girlfriend Emily Thomas, adopted the dramatic new look after wrapping production on the Elton John biopic Rocket Man.
He told the Press Association: "I actually found it quite liberating because I just finished the Elton John thing and I had this awful hair so I shaved my hair cos they had thinned it right out and given me this bald patch.
I know this sounds crazy because obviously my hair looks sick… but I'm considering a new hair style.
"It was very cathartic getting rid of it and also, not to put a downer on things, I split up with my girlfriend not long ago and it weirdly felt a bit like reinvention.
He added his Elton John haircut was "not the one, especially when you're single and ready to mingle".
The star, 29, revealed he had been keen to play the part years before he was cast, when Tom Hardy was still attached to the role.
"And that was in early 2016 and it took a couple of years to get going and we just wrapped.
Egerton's latest role is in a new big screen version of Robin Hood, in which he plays the veteran turned vigilante.
He said: "None of us wanted to make a Robin Hood movie that people have seen before and the way it was pitched to me was as a gritty re-imagining, something that was character-driven, which I think it is.
"What I liked the idea of was doing a version of a very famous hero, but giving him some real vulnerability and wobbliness.
"They are the things that I find really interesting, when someone who is not coping is doing something amazing.
"I think that is far more emotionally affecting than Superman, who does it all perfectly unless there is a bit of green rock, in which case he feels a bit sick.
"That just doesn't rock my world, it doesn't matter how great the actor is playing him.
"I just think fundamentally the character is too perfect, which is why the Hulk and Spider-Man work, because they are troubled guys, they are struggling, so I think that is what I liked about it.
Robin Hood is released in UK cinemas on November 21.