Playing the lead in Disney Channel's newest movie, 'Avalon High,' was like a mini vacation for Britt Robertson. Compared to her day job -- playing a foster child who reunites with her birth parents after 16 years in the system on The CW's 'Life Unexpected' -- the modern-day take on the Camelot legend was a whole lot more lighthearted, to say the least.

"['Avalon High'] was really very different," Robertson told TV Squad yesterday. "I've never done anything for Disney before. The genre in general is not something I'm typically pinned for. It's sort of like a realistic fantasy type movie -- it's a little more action-packed than I'm used to; it's a little more fun and playful. I started shooting after season 1 [of 'Life Unexpected'], so it was nice to be able to do something fun after that."

In the movie, which premieres tonight at 8PM ET on the Disney Channel, Robertson stars as a teenage girl who discovers that her new classmates at Avalon High are reincarnated versions of King Arthur and his court. She has to unravel the mystery of why, exactly, this is happening and stop Mordred, the traitor who killed Arthur (according to legend, that is), from doing it again.