In this old-fashioned screwball comedy, Christy Sloane (Eleanor Parker) is a secretary with a large legal firm who is sent to California to inform Peter Lockwood (Fred MacMurray), an overly sentimental radio host, that he's just inherited $2 million. Christy is looking to raise her standard of living, and she gets an idea -- what if she woos Peter and gets him to marry her before telling him that he's a millionaire? Christy decides that it's worth a try, even though she soon learns that Peter is due to marry his fiancée June Chandler (Kay Buckley) in a matter of days. However, the wedding goes haywire when Dr. Roland Cook (Richard Carlson), Peter's best man, takes a flyer shortly before the ceremony. It seems that he's secretly in love with June, and he can't bear to see her marry anyone else, even his best friend. Peter takes off to find Roland, with Christy eagerly tagging along, but after the two are soaked by massive waves while driving along the coastline, they wind up at a wild party thrown by a large, overly-cheerful Mexican gentleman (Chris-Pin Martin) who has somehow decided that they're honeymooners and begins plying them with large amounts of tequila. After a few drinks, Christy begins to realize that she actually likes Peter for himself, not just his money, but where does this leave his almost-wedding to June? A Millionaire for Christy was directed by George Marshall, who would go on to helm a number of Jerry Lewis vehicles (including several with his sometimes-partner Dean Martin).
by Mark Deming synopsis