'The Mortal Instruments' Jamie Campbell Bower Challenges 'Harry Potter's' Rupert Grint [PHOTOS]

"The Mortal Instruments" Jamie Campbell Bower has openly dared his former "Harry Potter" co-star, Rupert Grint to shave off all his hair. What could the dare possibly be for? Of all people, why would it be Rupert Grint?

In the Hunger Magazine Issue 5, "The Mortal Instruments" Jamie Campbell Bower and "Harry Potter's" Rupert Grint talk about music and upcoming movie series. For Jamie, the British blonde was asked what bands he had grown up which has undoubtedly helped in bringing people together for films.

"You always have fun on set. You're always going to have a common bond. There's always going to be music you can relate to - growing up my biggest bands were SUM 41 and Blink 182 - so there's an admission for you," stated Bower.

On the other hand, Rupert Grint who is best known for playing the ginger-haired Ron Weasley talks about his upcoming projects. Like Emma Watson and Daniel Radcliffe who have worked on big screen releases, Rupert is set to star opposite "Transformers" Shia LaBeouf.

"I've got a couple of things coming out at the end of this year. The first one is a film called The Necessary Death of Charlie Countryman in which I play an aspiring porn star. That's with Shia LaBeouf. And there's also CBGB, which is about the New York club CBGB that discovered loads of punk bands. I'm always looking for weird experiences and something completely different, and these two films definitely tick those boxes for me," explained Grint.

Given both stars were interviewed by the same magazine, it's not surprising that Jamie Campbell Bower would challenge his former "Potter" co-star in the "I Dare You" video section of the Hunger magazine website.

"Here's my dare for Rupert Grint - shave all of your hair off. All of it,' said Bower, adding, "Eyebrows, head... the lot! That is my dare to you Rupert Grint. If you do that, I will do the same."

Jamie is sure to do such a stunt because he isn't one to back down from a dare. In fact as proof, Jamie has the name Bob Dylan inked on his buttocks.

"My friend Ivan dared me to get Bob Dylan tattooed onto my bum - the name, not his face - and on the premise that he would get Beethoven tattooed on his," stated Jamie.

"Consequently I went first and he didn't get Beethoven and I had to get on the train back to school and couldn't really sit down," continued the "Mortal Instruments" star.

Check out the slideshow to see more of this cheeky chap, Jamie Campbell Bower.