The story of “Royal Wedding” sees brother and sister Tom and Ellen Bowen as stars of “Every Night at Seven,” a Broadway theater success. They are persuaded to take the show to London, capitalizing on the wedding of Princess Elizabeth and Philip Mountbatten, Duke of Edinburgh.
On the ship, Ellen meets and quickly falls in love with the impoverished but well-connected Lord John Brindale. While casting the show in London, Tom falls in love with a newly engaged dancer, Anne Ashmond. Tom assists Anne to reconcile her estranged parents and also asks his agent to locate Anne’s supposed fiancé in Chicago—only to discover that he’s married….