Am I the only one...

Who thought that this kid in Narnia 3 was a girl? It reminded me of Cathy Bigby who played Peter Pan in the musical (http://www.imdb.com/title/tt0255873/), someone who was a girl playing a male role. But then I came on here and found out it is indeed a boy who played Eustace. His voice throughout the film sounded girlish and fake as if he would be trying to mask his female voice - except it really is a boy. I've asked others who've seen it, they all thought it was a girl too (no offense to the kid). Did anyone else feel the same?