Donal Gibson (born 1958) is an American actor and the younger brother of actor/director Mel Gibson.
Gibson was born in Peekskill, New York, the son of Irish-born Anne Reilly Gibson and Hutton Gibson, whose mother came from Australia. The couple had 11 children. Gibson's father worked as a railroad brakeman until a work accident forced him to retire. He received a disability settlement, and in 1968 moved his family to Australia, when Gibson was ten years old.
In Australia he studied drama at the University of Newcastle and the Sydney Drama Studio. His professional debut was at the Nimrod Theatre Company in Sydney, playing Shorty in the play The Resistible Rise of Arturo Ui.
He has done voice acting in television series and films, including John Smith in ', a part that was voiced by his brother in the original Pocahontas film. Other voice roles are Captain Boomerang in Justice League Unlimited, Park Worker in The Wild Thornberrys, and Ray Tracer in ReBoot.
Gibson had roles in three of his brother's films. He played Riverboat Gambler in Maverick, Stewart in Braveheart, and Doctor in Conspiracy Theory.
Other film roles include Karl Holtz in Immortal Beloved, and Eric in Resistance.