London, Jan 21: Emma Watson had `no idea' who Dame Maggie Smith and Gary Oldman were before she started working with them on the Harry Potter movies.

The British star - who shot to fame playing Hermione Granger, one of three starring roles in the popular film franchise - grew up in an academic family and barely watched movies.

And the 18-year-old insists she wasn''t starstruck when she first set foot on the Potter set - because she didn''t recognize most of her distinguished co-stars.

"I didn't go to acting school so I didn't know that's what I wanted to be," reveals Emma, who left boarding school in Oxford last summer," the Daily Express quoted her, as saying.

"I came from a background of lawyers and academics and we just didn't watch films in our household.

"I had no idea who Maggie Smith or Gary Oldman or any of these people were," she added. (ANI)