'Tweener superstar Miley Cyrus continues unabated on her way to world domination. She's just been announced as the voice of Penny in Disney's upcoming animated movie "Bolt," co-starring John Travolta. Her 3-D concert film earned huge money earlier in the year. The Cyrus casting, along with the fact that the movie has a clever premise -- a dog who thinks he's a super-powered mutt but doesn't realize he's just the star of a TV show -- immediately lifts "Bolt" to front-runner status for end-of-the-year box office favories.

"Bolt" arrives in theaters on November 26th.