Australian actor Damon Herriman has joined the cast of Clint Eastwood's J. Edgar, which will begin principal photography early in the New Year, according to Indie Wire.

Charlize Theron is also in talks to join the film as Helen Gandy, a Justice Department file clerk who ended up being Hoover's personal secretary, working for him for more than 50 years.

Damon Herriman will portray Bruno Hauptmann, the man convicted of kidnapping and killing the Lindbergh baby. His conviction later came into question however, with police accused of doctoring evidence as well as ignoring and intimidating witnesses. The questions raised prompted J. Edgar Hoover to launch an FBI inquiry into the handling of the case.

In the film, Leonardo DiCaprio plays a young J. Edgar Hoover and Armie Hammer stars as his assistant/closeted lover Clyde Tolson.

J. Edgar was written by Oscar-winning screenwriter Dustin Lance Black.

The film is gearing up for an early February shoot in Los Angeles.