Lilly Jay with her ex-husband, Ethan Slater. Slater started dating Ariana Grande after they met on the set of "Wicked."Walter McBride/Getty Images; Kevin Winter/Getty ImagesIn a personal essay, Lilly Jay, Ethan Slater's ex-wife, opened up about their divorce.In 2023, news broke that Slater was dating his "Wicked" costar, Ariana Grande.Jay said the movie's recent premiere reminds her of the saddest time of her life.Lilly Jay, a perinatal psychologist and ex-wife of Wicked star Ethan Slater, has spoken for the first time about their break-up and being thrust into the spotlight.In July 2023, rumors circulated that Slater was dating Ariana Grande, his "Wicked" costar, leading to Jay and Slater separating (though one source told People that Jay and Slater were already separated when the relationship began).Jay published an essay in The Cut on Thursday, describing her experience in the aftermath of their divorce, which became official in September.