(This has spoilers, mainly on the changes made to the story. You've been warned.)
Published in 2005 by Meg Cabot, 'Avalon High' is one of my favorite books. Originally when Disney picked up the rights, I was excited. Now that I've seen it, I think Disney missed the mark a bit. 'Avalon High' was a decent Disney special, best watched by those who haven't read the book.
The Synopsis (From Disney Movie Guide)--
Avalon High at first appears to be a typical American high school to Allie Pennington, a transfer student, but soon the perception changes. Allie begins noticing unmistakable similarities between her new school and the legendary Camelot, and as the story progresses, Allie becomes obsessed to the point that she is convinced it's up to her to solve the mystery lest history repeat itself."
The cast-- All in all, I liked the cast. They were all believable in their roles, even down to main character Allie's quirky parentsGregg Sulkin