Molly Weasley: Julie Walters
The mother of Ron Weasley, Harry’s best friend, played one of the most important yet underrated roles in the saga. She was maybe the only mother figure Harry Potter had in his life after his parents died. She was played by actress Julie Walters, who’s not short on charisma. Another beloved character this actress brought to the big screen is Rosie Mulligan from Mamma Mia!