Yeah so I fancasted the Percy Jackson TV show... Ummm... Annabeth, Percy and Grover are the ages they are in the first series, and the others are the ages they are in heroes of olympus.
#1 ANNABETH
The first is Helena Zengel. She looks a bit too serious for Annabeth, but she's twelve so...
And the second is Mia Talerico, which looks good if she wears gray contacts (her eyes are already light so it wouldn't be that bad)#2 PERCY
I've seen a lot of people cast Madison Rojas for Percy, probably because he's like the only thirteen year old boy actor that looks like him... But he's good... Wait I need to show you this:
That's young Logan Lerman... Dude he's like so PERCYYYYY why couldn't they film the movies when he was like thatttttdgdhhsh?!
#3 GROVER