The cast of a long-awaited seminal road voyage film has added another cast member. Variety is reporting that Kirsten Dunst has joined the cast of On the Road.

The film is based off the classic Jack Kerouac book where he and his friend Neil Cassidy, under the aliases Dean Moriarty and Sal Paradise, traveled across America. It wasn't clear as of yet what role Dunst would play in the film. Garrett Hedlund will play Kerouac/Moriarty, Sam Riley will play Cassidy/Paradise, while Kristen Stewart has also signed on to play Kerouac's wife.

Walter Salles is directing the film and it was also said that the director retraced Kerouac's route mapped out in the book and has compiled enough footage for a possible feature-length documentary, which he would entitle In Search of On the Road.

The film was said to start shooting in August.