"The Mortal Instruments" star Lily Collins has snagged yet another fashion magazine cover in the form of Glamour UK. Collins sports beehive hair for the September 2013 issue where she opens up about her on and off screen love interest, Jamie Campbell Bower. Here's all things "Jamily" in Collins Glamour UK interview.

Jamie Campbell Bower and Lily Collins have become one of Hollywood's hottest young couples since meeting late last August 2012. Both stars met on set where the blooming romance begun. Obviously, while their characters in "The Mortal Instruments: City of Bones" Jace Wayland and Clary Fray were falling in love, they too were in real life.

"People are cast because they have chemistry. You're spending 24-hour days together and it's intense... plus you really get to know the best and worst sides of people - the rawest sides of people," explained Collins.

"You're perfect for the role because you have that connection with each other and sometimes that translates into more," added "The Mortal Instruments" star.

Unlike other couples who have kept a lid on their relationship status, Lily Collins has been quite vocal and open about it. Lily has nothing but great things to say about Jamie, whom she says is "edgy, witty and charming."

Aside from opening up about her onscreen beau, Lily talks about her onscreen best friend for the film, Robert Sheehan.

"For a while it was just the two of us. Then came Robert. It's funny because they're so different," stated Collins, adding, "Robert is so enthusiastic and so Irish and Jamie is so British, edgy, witty and charming. The three of us were joking all the time."

Check out the slideshow to see more outtakes from Lily Collins shoot with Glamour UK. The September issue of the magazine hits newsstands today.

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