Obviously, I would audition for Holly.
1. So that I know she wouldn't get too screwed up by some ding-dong who doesn't know what Artemis Fowl even is. I see that so much and it irks me like heck.
2. I look like her down to a T, I believe. My eyes sometimes change color a little, but generally they are hazel, and I also have reddish-brown hair.
3. I'm like 4"9' and done growing, which is probably as close to the height they want combined with the age they're going to get.
4. I have a modem of acting skill.
5. I wouldn't really have to act that much either, at least according to people I know. I have several friends around me who have read Arty as well, and all of them agree with me about the before stuff, and I've been told by them I have a very similar personality to her.
... I sort of feel like a little 6th grader campaigning for class president or something. I feel like I should finish with some powerful "Vote for Me!" or something.