A handsome, brunette, mustachioed Australian-born actor in the George Brent tradition who bolstered many femme stars in late 30s romantic dramas, including Greta Garbo and Irene Dunne.
Died of a heart attack while appearing on the Chicago stage with Mae West in "Sextette". The play was made into a movie ( Sextette (1978) ) with Timothy Dalton in Marshall's stage role.
Original casting choice for Rhett Butler in Gone with the Wind (1939).
Suffered from a chronic nervous condition which ended his film career, forcing him to return to the theater.