Erin Doherty hard-launched her relationship with partner Sinéad Donnelly in spectacular fashion, with a kiss at the 2025 Emmy Awards last September. “Thank you for making me the happiest person in the world,” she said moments later, accepting an award for her role in Netflix’s Adolescence. “I love you with everything I've got.”
Despite that very public (and undeniably sweet) display of affection, Doherty largely keeps her personal life out of the spotlight. Her girlfriend isn’t in the industry, and Doherty herself has long seemed more interested in doing the work than reveling in the attention that comes with it. (“I honestly have difficulty processing [fame], even now,” she said in 2020, after breaking out as Princess Anne in Seasons 3 and 4 of The Crown.)
Keep reading to learn more about Doherty and her partner, along with a look back at Doherty’s previous relationship with actress Sophie Melville, whom she dated for seven years.
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Yes. The A Thousand Blows star is dating radiographer Sinéad Donnelly. The pair were first linked in August 2025, after Doherty shared an Instagram Story of the two holding hands over a glass of wine while on vacation. “Take us back to Italy, please,” she wrote, according to The Daily Mail.
Who is Erin Doherty’s partner?
Doherty is in a relationship with Sinéad Donnelly, who works as a radiographer at Whipps Cross Hospital in London. It’s unclear when the two lovebirds started dating, but it was presumably sometime after Doherty’s split from previous longtime girlfriend Sophie Melville. (That breakup was confirmed in March 2025 but likely took place a bit before then.)
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Despite dating an actress, Donnelly has no known ties to the entertainment industry. She works as a radiographer at London’s Whipps Cross Hospital, which is run by the Bart’s Health NHS Trust. According to her LinkedIn profile, she earned her Bachelor of Science from Birmingham City University in 2011 and her Master of Science in Nuclear Medicine from the University of Salford in 2016.
“I have gained a vast amount of clinical experience working in the NHS for the last 15 years and I have a keen interest in service delivery and management within the healthcare industry,” she writes on her page.
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Is Erin Doherty still with Sophie Melville?
No. The actresses split sometime around March 2025, although neither party publicly addressed the breakup at the time or since.
The couple was together for about seven years. They met in 2017 while working on The Divide, a play by Alan Ayckbourn that debuted at the Edinburgh International Festival and opened the following year on London’s West End, and made their romance public in 2019 — the same year Doherty debuted in The Crown.
“I’m not gonna lie, I won’t name names, but when I got The Crown, I felt a lot of pressure to withhold my sexuality,” Doherty told The Telegraph in 2022. “There was a period of time when I was like, do I get to be open about this in order to have a successful career? And the fact that that question still went through my mind, and may still go through other people’s minds, is so gutting.”
She went on to lament the “years and years and years” that some actors have spent hiding their sexuality for the supposed sake of their success, saying, “I just want to be part of trying to do something about that.”
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Who was Erin Doherty’s long-term girlfriend?
Prior to dating Donnelly, Doherty was in a seven-year relationship with actress Sophie Melville, whom she met in 2017 while doing the play The Divide in London. (They also shared the stage in 2019 for Ross Willis’s Wolfie.) In a video shot for Audible in 2020, Doherty called her partnership with Melville her “greatest achievement.”
Around that same time, the couple bought a pad of their own in South London, where they lived with their dog, a Pug/Jack Russell mix, Free. “She’s made me so healthy,” Doherty said of Melville in an interview with Porter. “I used to sit at home eating a bag of chocolates and now we have like, a kale salad.”
It’s unclear why the couple called it quits after seven years together, as neither party has spoken publicly about the breakup.
When did Erin Doherty come out?
It's unclear exactly when Doherty came out to family and friends, but in March 2025, on the “How to Fail With Elizabeth Day” podcast, Doherty revealed that she didn’t have her first relationship with a woman until she was 24 or 25 years old. “It took me a really, really long time to finally get to the point where I was like, ‘Oh, I'm gay,’” she said.
She went on to explain that, prior to coming out, her relationships with men weren’t “satisfying in that whole-hearted way that I wanted them to be” and that when she finally dated a woman it was “mind-blowing.”
“It felt like I had come home,” she shared. “I was just like, wow, this is a part of who I am that I'd never got to meet, which was just so crazy.”
Now 33, Doherty hopes that by telling her story, she can help others embrace their sexuality, too. “Just lean into your truth," she said. "Because there was something so monumental about that moment of going, whoa, like this is me and just embracing it and not applying anything else to it. I just think we all deserve that.”
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