07/17/2009 at 12:00 AM EDT
The halls of West Beverly High may be a danger zone of cliques and catfights, but off-screen the cast is welcoming newbies with open arms -- good news for upcoming guest star Rumer Willis
"Rumer Willis is joining us for a little while. I'm not sure for how long, but we are very excited," Shenae Grimes
, told PEOPLE at the One Year Anniversary Party for 3.1 Phillip Lim Los Angeles Store.
It looks like Grimes's character, the sweet girl-next-door Annie Wilson may be the one in search of new friends in the upcoming season.
"That's kind of a big twist this year. I'll start out on a different foot then I did last year. I'm not part of the gang for a little while and you’ll see why," said Grimes.
returns Sept. 8. -- Michelle WardTell us: What will happen with Annie?