Raise Your Voice (a.k.a Heart of Summer or Raising your Voice) is an American musical drama film (United States) released in 2004 (2004 in film) for the teen audience starring Hilary Duff as Theresa "Terri" Fletcher (New Line Cinema) in the lead role. It was directed by Sean McNamara (Sean McNamara (director)) and stars Oliver James (Oliver James (entertainer)), Lauren Mayhew, David Keith, and Dana Davis co-star. Filming of the movie began in january 2004. The film tells the story of a teenage girl from Flagstaff, Arizona who spends the summer at a performing arts school in Los Angeles against her fathers will. It received mainly poor reviews from critics and did not live up to box office expectations, garnering just $14,867,514.

The film was originally conceived by New Line Cinema music executive Mitch Rotter and pitched as a "Christian Music Project". The role of Terri was originally cast to Evan Rachel Wood, who later dropped out due to scheduling conflicts. The film features songs from Duffs album Hilary Duff (Hilary Duff (album)), which was released in the U.S. a week before Raise Your Voice; the songs featured are "Fly (Fly (Hilary Duff song))", "Someones Watching over Me" and "Jericho".

Raise Your Voice was the first live-action film to air on The CW (The CW Television Network), having aired on Thanksgiving Day 2007.