That film landed with a June 14th, 2019 in Japan and the film saw a December 25th, 2019 home video release as well.
The Uta no☆Prince-sama♪ franchise revealed back in May 2017 that they would be bringing a feature film that would be called Uta no☆Prince-sama♪ Love Kingdom.
The first film had Takeshi Furuta as the chief director working with Tomoka Nagaoka with A-1 Picture animating it.
The film will be done as concert footage in what seems to be its entirety.