Julianne Moore is once again proving her incredible acting abilities by playing former Alaska governor Sarah Palin in the HBO film Game Change.

The 51-year-old four-time Oscar-winning actress stars opposite Ed Harris as John MCCain and Woody Harrelson as adviser Steve Schmidt.

The film is based on a book with the same title ... that chronicles the actions of both the Republican and Democratic parties during the 2008 race.

Game Change premieres next March.