The pair has been dating since 2014. Morelli, a writer for Orange Is the New Black, was previously married but she and her husband jointly filed for divorce after she realized upon joining the staff that she was a lesbian. In an essay she wrote for Mic.com in May 2014, Morelli said that the OITNB storyline between Piper Chapman (Taylor Schilling) and her ex-girlfriend, Alex Vause (Laura Prepon), was a huge push for her to come out, after only being married a few months.
"I was nervous about the first love scene I'd written for Alex and Piper," Morelli wrote. "I'd loved writing it, loved watching a tenderness emerge in their relationship where passion always seemed to be the ruling principle, but by that time, I was so deep in my own self-doubt that I constantly felt like a fraud. I was sure it was bleeding into my writing. How could it not? I was married to a man, but I wasn't straight."
"I found a mouthpiece for my own desires and a glimmer of what my future could look like," she added.
ET spoke to Wiley last month, when she talked about -- [Spoiler Alert] -- her beloved OITNB character, Poussey Washington, being killed off at the end of season four.
"I feel like I grew up on that show … Those were really formative years," she said. "I'd never played a character as long as I played Poussey. Spending time with her, so much time embodying that character, it was so -- and still is, and always will be -- so special to me and a part of who I am."
"There are so many people that are so attached to her in a way that I don't think I understood until this happened," she added.
Watch the video below to see an exclusive look at Wiley in her latest role -- playing a pregnant mother and wife in 37 -- a retelling of the horrific true crime of Kitty Genovese's 1964 murder in New York.