The 24-year-old actress stars in the new film The Mortal Instruments: City of Bones as Clary Fray, a girl who learns that she descends from a line of half-angel warriors called Shadowhunters who protect the world from demons.
“There was a moment at which we’re on the rooftop in the vampire scene, when the vampires fight, and we burst out of this door and we’re in serious fight mode,” Lily gushed to JJ about her favorite off-screen moment. “But two seconds before they yelled action, we were in the dark, like literally peeing our pants laughing because we were making fun of each other and doing voices. And then they yelled ‘Action’ and we didn’t hear it, and we had to burst out the doors.”
Be sure to check out Mortal Instruments: City of Bones, now in theaters!
For more from Lily‘s photo shoot and interview, visit