Tom (Fred Astaire) and Ellen (Jane Powell) Bowen are a brother and sister dance duo invited to perform in London during the same time that Princess Elizabeth and Prince Phillip are to be betrothed. But dancing takes a back seat to romance when the leadinglady falls for an English gent, leaving her brother in the dust. In his sister's absence, Tom finds an unlikely partner in a hatrack and performs two incredible solosone with his wooden partner and in the other, he magically tap-dances on the ceiling! But love is in the air, and before long, Tom also falls in love. As a joyful quartet, the pairs bask in their coupledom and are awarded the prestigious honor of attending the much-anticipated Royal Wedding.