Miriam Margolyes says people who are still big “Harry Potter” fans as fully functioning adults worry her a bit. The actress, who played Professor Pomona Sprout in two Harry Potter movies, did a recent interview with New Zealand's 1 News. Miriam says people that are still obsessed with the Harry Potter movies concern her because they're still acting like lil' kids. Miriam said Harry Potter is for children, and the adults still clinging to their childhood nostalgia need to get over it.