She won an Emmy for her electric performance in the Netflix smash hit, but the casting process wasn’t exactly hiccup-free. The actor opens up about a year of success, struggle – and how she nearly became a footballer

For a while, Erin Doherty ignored Stephen Graham’s calls. Not deliberately, she stresses with a laugh. “I’m just really bad at my phone. I’m such a technophobe, and he knew that,” she says. They had made the Disney+ show A Thousand Blows together, in which Doherty plays an East End crime boss in Victorian London, and Graham had talked about an idea he wanted to dramatise, about a teenage boy who is catastrophically radicalised by online misogyny. A couple of months after they’d wrapped A Thousand Blows, Graham and his wife and producing partner, Hannah Walters, kept trying to get in touch. “I was getting voice notes from him and Hannah being like, ‘Erin, pick up your phone!’” Doherty’s girlfriend told her to ring him back and Graham offered her the role in Adolescence. She said yes on the spot, without reading the script.

Since it was screened on Netflix in March, Adolescence has had nearly 150m views. It sparked a huge cultural conversation; it was shown in secondary schools and its creators were invited to Downing Street. Did they have any idea it would become such a phenomenon? “No, and I’m not sure you’re supposed to,” says Doherty when we speak. She is chatty and down-to-earth, even in the year her career went stellar. As well as starring in A Thousand Blows, her role in Adolescence – as Briony Ariston, a psychologist – won her an Emmy for best supporting actress. “But you do know when you’re a part of something that’s good and deserves to be seen, and we knew that about it. I think because it came from such a genuine place, a place of real purity and rawness, it [fed into] the making of it. From day one, it had that electricity.”