Casey McQuiston is an American author of romance novels in the new adult fiction genre. They are best known for their debut novel Red, White & Royal Blue, a New York Times bestseller that follows the son of America's first female president as he falls in love with a prince of England. The book gained significant popularity and established McQuiston as a prominent voice in contemporary romance. Beyond their debut, McQuiston has written One Last Stop, a sapphic romance novel that further demonstrated their range within the genre. In 2022, they expanded into young adult fiction with I Kissed Shara Wheeler, released on May 3, 2022. That same year, McQuiston was recognized as one of the most influential emerging figures in their field, being included in Time magazine's 2022 Time 100 Next list.