UP hasn't released their Christmas lineup yet but I did stumble across this one on IMDb which is a sequel to Last Year's movie
Christmas with a Prince - The Royal Wedding
Its Christmas again and Dr Tasha is on her way to meet Prince Alexander in St. Savarre. Though this is a happy time it is also a very stressful as a treaty is being negotiated between St. Savarre and Vandelien.When Tasha arrives, Alex surprises her by asking for her hand in marriage. She accepts and they immediately begin planning the wedding. When Princess Miranda finds out she is not happy. She concocts a plan to put a halt to this fairy-tale. Will Miranda succeed or will Tasha have her happily ever after?