Marion Davies stars as Beverly, an American student who gets talked into masquerading as her cousin Oscar after he gets injured in a skiing accident. Oscar (Creighton Hale) was just about to travel back to Graustark to claim the throne and secure the country from the evil General Marlanax (Roy D'Arcy). Of course there are complications when she falls for her bodyguard, Antonio Moreno, a goatherd who rescues the "prince" from an ambush.
Davies is a delight. The scene in which she must drain a huge tankard of beer (as a toast to the army) is hilarious. At a great ball, Davies manages to talk the scheming Carlotta (Paulette Duval) into taking off her gown, which Davies escapes with to flirt with Moreno. All is well when Oscar finally appears in Graustark.
Davies impersonated young men in many of her films (MARIANNE (both silent and talkie versions), LITTLE OLD NEW YORK, Hollywood REVUE OF 1929, and WHEN KNIGHTHOOD WAS IN FLOWER come to mind). Davies also masquerades is many other films: in QUALITY STREET as her own niece, OPERATOR 13 as a black servant, EVER SINCE EVE as a frumpy secretary, GOING Hollywood as a French maid, etc.
BEVERLY OF GRAUSTARK was a big hit at the box office and is said to be Davies' most profitable film for MGM.