Her name's Jodelle Ferland, and she's only 11 years old. She played Emily Dinsmore (S2's Accelerate: Lana's childhood friend, cloned by LuthorCorp), and she stars in Terry Gilliam's movie Tideland, which is based on a novel by Mitch Cullin. I haven't read the book but the movie was seriously warped. I wouldn't recommend it for the sensitive or the squeamish (there's some pretty confronting content), but Jodelle's performance is out of this world... kinda literally!
Jodelle plays Jeliza-Rose. The basic plot is that after her mother dies from a heroin overdose, she and her father return to the rural farmhouse where he grew up. Jeliza-Rose attempts to deal with her bizarre life by play-acting with her 'friends' (bodiless Barbie doll heads) and eventually with Dickens, a disturbed soul who lives next door, browbeaten by his even-more-disturbed sister. The cinematography is gorgeous and the score's fantastic. Gilliam explores the fluid connection between reality and imagination in a typically whimsical manner, blending the fantastic and the grotesque. It's definitely not a movie for everyone. You can check out more images from production here.
Jodelle is high on my 'watch' list now. Her impressively longIMDB bio tells me that she's a Johnny Depp fan (of course!) and provided me with this gem of a quote: "They like to cast me for scary roles. I think it's because they want you to be scared, but also want you to like the little girl." Honey, you got it in one!
Oh, and she's also been on Supernatural. Not that I care. ;-p *pokes tongue at half her f'list*