A charming if very lightweight little comedy, Miss Grant Takes Richmond may be little more than a sit-com expanded to feature length -- but it's a very pleasant one. Certainly, the effort to make this slight story fill up its allotted time shows a little here and there, but Grant is such an amiable little film that most viewers won't mind that. Besides, Grant offers Lucille Ball one of her best comedic film roles, and also lets William Holden display his flair for light comedy. Both stars are a great deal of fun, with Ball in fine form as the ditzy but not THAT ditzy secretary and Holden extremely winning as the ambitious bookie whose innate goodness can't be disguised for long. Of equal importance, the two performers evince a genuine chemistry, working together like a well oiled machine. They are ably supported by the always-dependable James Gleason, who is in very good form, and the very amusing Frank McHugh. The players all know how to handle this kind of material, aided by director Lloyd Bacon's deft comic touch. If Grant's screenplay keeps it from being a really special laugher, it's still a pleasant little trifle.