Red, White & Royal Blue is an LGBT romantic comedy novel by Casey McQuiston. It follows Alex Claremont-Diaz, the First Son of the United States, and Prince Henry Fox-Mountchristen-Windsor of the British royal family. The two publicly feign a friendship after an embarrassing incident at a royal wedding is dubbed "Cakegate." Their forced proximity soon leads to a secret, deeply complicated relationship. As Alex's mother, President Ellen Claremont, pursues her reelection, the relationship between Alex and Henry threatens to become an international scandal that could derail the campaign and upend two nations. The novel explores themes of love, duty, and the struggle for acceptance in the public eye.