NEW YORK - Hilary Duff is joining the cast of 'Gossip Girl' -- but not on a regular basis.
The CW series' spokeswoman, Melissa Burton, says the 21-year-old singer and actress will guest-star next season as `a movie star looking for a typical college experience.'
Duff's character, named Olivia Burke, enrolls at New York University and becomes roommates with `Gossip Girl' hipster Vanessa, portrayed by Jessica Szohr.
Oh, what a tangled web: Burton says Olivia will spark a romance with aspiring novelist Dan, played by Penn Badgley. As fans know, Vanessa used to have eyes for Dan - then they dated other people.
Duff begins her `Gossip' arc on Oct. 5.
Season three premieres Sept. 14, as the prep kids head off to college.
