Harold French Director Richard Todd Rob Roy MacGregor Actor Glynis Johns Helen Mary MacPherson MacGregor Actor James Robertson Justice Duke Campbell Actor Michael Gough Duke of Montrose Actor Jean Taylor Smith Lady Margaret Campbell MacGregor Actor Geoffrey Keen Killearn Actor Finlay Currie Hamish MacPherson Actor Archie Duncan Dugal MacGregor Actor Russell Waters Hugh MacGregor Actor Marjorie Fielding Maggie MacPherson Actor Eric Pohlmann King George I Actor Ina De La Haye Countess von Pahlen Actor Michael Goodliffe Robert Walpole Actor Malcolm Keen Duke of Marlborough Actor Perce Pearce Producer Lawrence Edward Watkin Writer Walt Disney Executive Producer Cedric Thorpe Davie Original Music Guy Green Cinematographer Geoffrey Foot Film Editing Carmen Dillon Production Design Geoffrey Drake Art Director Phyllis Dalton Costume Design