"Harry Potter and the Order of the Phoenix" was Lynch's debut screen performance in 2007. The film was a box office hit and garnered favourable reviews. Critics praised the performances of the supporting cast; Lynch was often singled out for acclaim: "The New York Times" called her performance "spellbinding", and Jane Watkins of "Country Life" said she " an appealing sweetness to her character that's not so developed in the book". She also voiced the character in the film's tie-in video game. Lynch reprised her role in "Harry Potter and the Half-Blood Prince" (2009). The film was critically and commercially successful. Wesley Morris of "The Boston Globe" wrote that Lynch "combats the movie's occasional sluggishness with a hilarious sluggishness of her own", and Michael Dwyer of "The Irish Times" called her the best Irish actress of 2009 for her work on the film. Her performance earned her Scream Award and Young Artist Award nominations, and she returned in the film's tie-in video game.