While she’s obviously a 9 in our perverted little brain-movies, actress Teresa Palmer has been cast as alien Number 6 in the Steven Spielberg/Michael Bay produced sci-fi actioner I Am Number Four. The film is an adaptation of the upcoming HarperCollins young-adult novel of the same name written by James Frey (”A Million Little Pieces”) and Jobie Hughes.

I Am Number Four centers on nine aliens living incognito as high school students in Paradise, Ohio after their home planet is destroyed by evil extraterrestrials. “Smallville” creators Al Gough and Miles Millar penned the script.

"I hope no one remembers this movie when I'm cast in a Spielberg flick"

Palmer creds include Disney’s upcoming The Sorcerer’s Apprentice, Takashi Shimizu’s The Grudge 2, and the 2008 erotic thriller Restraint, for which she went nude.

I Am Number Four is directed by DJ Caruso (Disturbia) and costars Sharlto Copley (District 9) and Alex Pettyfer (Beastly) as the titular hero Four. It’s slated for release on Feb. 18, 2011.

(UPDATE: Teresa Palmer talks about her Warm Bodies)