Mrs Weasley
Background
Molly Weasley is a witch. She is married to Mr Weasley. Her children are Ginny Weasley, Percy Weasley, Fred Weasley, George Weasley and Ron Weasley.
During the events of Harry Potter and the Sorcerer's Stone (2001) played by Julie Walters
At the train station, Harry Potter hears Mrs Weasley complain about Muggles and he follows her, Ginny Weasley, Percy Weasley, Fred Weasley, George Weasley and Ron Weasley to Platform 9 3/4. Percy goes first, followed by Fred and George. Harry asks Mrs Weasley for help and she explains how to disappear into the wall and come out at the proper platform and Ginny wishes him luck.
During the events of Harry Potter and the Chamber of Secrets (2002) played by Julie Walters
Mrs Weasley comes downstairs and yells at the Weasley boys. Ginny runs downstairs and stares wide eyed at Harry and then runs away. Mr Weasley walks in and tells everyone of the nine raids he conducted and then meets Harry. Mr Weasley is asking Harry questions about non magic users when Errol flies into the window with a piece of mail. Percy takes the letter which includes all of the children's Hogwarts letters, including Harry's. They travel to Diagon Alley using Floo Powder. They go into Flourish and Blotts where Gilderoy Lockhart is selling copies of his book Magical Me. Short Man - Daily Prophet takes a photo of Lockhart and when Lockhart recognizes Harry, Short Man - Daily Prophet grabs Harry and shoves him towards Lockhart who has his photo taken by Harry. Lockhart then uses Harry to help sell his books and Mrs Weasley takes the collection of books Harry was given free of charge by Lockhart to have them autographed. Later, the Weasley's go to the train station and teleport through platform 9 3/4, except Ron and Harry, who are last. After Ron steals the Ford Anglia, Errol delivers a Howler message to Ron from Mrs Weasley who yells at Ron through the Howler.
During the events of Harry Potter and the Prisoner of Azkaban (2004) played by Julie Walters
Ron, George, Fred, Percy, Mrs Weasley, Ginny, and Mr Weasley come into the main room of the Leaky Cauldron and Mrs Weasley asks Harry if he has everything he needs. As Ron is leaving on the train to Hogwarts, Mrs Weasley runs and hands him Scabbers.
During the events of Harry Potter and the Order of the Phoenix (2007) played by Julie Walters
Harry, Nymphadora Tonks, Alastor "Mad-Eye" Moody, Kingsley Shacklebolt, Elphias Doge, and Emmeline Vance go to Grimmauld Place where Sirius is having a meeting with Mr Weasley, Professor Lupin, Professor McGonagall, and Mrs Weasley. The meeting ends and Harry says hello to everyone and Sirius gives him a hug. Kingsley hands Harry a newspaper where Fudge is accusing him and Albus Dumbledore of lying about Voldemort. Sirius tells Harry that Voldemort has been trying to recruit followers and that Voldemort is trying to get something he didn't have last time. Later, Harry has a nightmare that Mr Weasley was attacked by Nagini and tMr Weasley is saved. On Christmas, Harry, Sirius and Hermione Granger join the Weasley family at Grimmauld Place for Christmas dinner and gifts and Mr Weasley is shown to be recovering from his attack.
During the events of Harry Potter and the Half-Blood Prince (2009) played by Julie Walters
Ginny sees Hedwig in the living room and asks Mrs Weasley when Harry arrived. During holiday break, the Weasley house is attacked by Death Eaters including Bellatrix Lestrange and Fenrir Greyback. After the attack, Mrs Weasley watches as her house burns.