Rebellious teen actress Kristen Stewart has put her dreams of attending a prestigious American university on hold - because she has "an authority issue".

The 18-year-old Twilight star has yet to finish her high school studies, since her acting career has skyrocketed with attention from the new vampire film.

And she admits her own teen angst is to blame.

She says, "It's sort of embarrassing but I'm finishing my last year of high school. It's been a bit of a rough road. I'm entirely self-indulgent and I put things off so I just took a little longer but it's ok.

"I have a bit of an authority issue. I've grown up saying yes I'm going to get to an Ivy League (private university). I definitely have a future in academics, it's just not a really conventional one. I don't know what happened but I'm going to do my own thing for a while."