One will forgive you for your ignoranced, Mr. C-141, as you are old, and consequently not quite right in the head.
Suffice it to say that the avatar in question represents one's favourite actor, who is certainly not girly, despite his tender years. Thus it was so before LOTR, and after. He has done a lot of arguably better roles previously, in being the best child actor since Mark Lester.
It fits perfectly with the Chief Defender of the Battleship, as several of his roles have veritably saved the earth itself.
Tsk.
Well, as long as a hero(ine) can save the earth, I'm certainly not prejudiced on their looks

.
When I saw the original pix being posted, I did think they were female, but the as others posted, I started to think from the context that they were male after all. If one has seen the movie, I'm sure there is no confusion though. I thought the stuff on the cheeks was makeup, or possible war paint or something, but one post mentioned a reflection or something.
You mentioned "child actor". Of curiosity, what is the age of the actor, and the age of the movie character? Anyway, if you're happy with it, that is all that matters!
by Duke o York:
The Fellowship of the Ring was published in 1954 and Tolkien was not the first person to come up with orcs and elves. Stormerne might be able to tell you more, but such creatures have been a staple part of European mythology for centuries.
That would be interesting. I did not realize the geneology of Orcs, but I did read Beowulf in college. I just don't recall orcs, but maybe that's because of the well-know orcs in Warcraft that tend to be fresher and more common in experience.
I agree with Floppa21... I'd want to read the book, since Tolkien is a well known and respected author (e.g., he did not write just to produce a movie and sell merchandising rights).
by Darkshade:
He was also one of the compilers of the Oxford English Dictionary,
Wow, I did not know that!