It's just a rumor! At least that's what the New Moon
When scribe Melissa Rosenberg
was asked if VaneXXXa Hudgens
has indeed auditioned for the role of Leah, she answered:
"...if Vanessa is auditioning for the role of Leah, she's written her own pages to read, 'cause I didn't write 'em. "
Yup, Leah is not going to be in the movie version of Twilight
Furthermore, E.W. reports
that studio insiders AND people in Hudgens' camp have debunked the casting buzz.