Harry Potter and the Half-Blood Prince” it dominated the box office  with opening day ticket sales of $58.4 million, the movie is poised to be the series’ most successful opening to date.  and of course and it might break more record this weekend.  “Half-Blood Prince,” of course, is the 6th movie in the series.  The 3 young actors who star as Harry, Hermione, and Ron started out the series as pre-teens and have now grown up together… so we  asked Rupert Grint if he ever looks back at the old movies – you know, when they were “still kids.” (CLICK ON THE MEDIA BAR BELOW TO HEAR RUPERT GRINT)