She could play...
...the new Dr Who assistant!
I think she'd be a really good choice, she's such an amazing actress.And it would really get her noticed by people.
Though I'm mostly basing my opinion on the fact that my brother (who is 7) likes Dr Who and he said he thought she was 'pretty like a horse' - He really likes horses right now - it's not as much of an insult as it seems.