There’s a reason why Sophie Turner is so obsessed with Twitter – it’s like her own personal headhunter!

The Game of Thrones actress, who plays Sansa Stark on the addictive HBO drama, credits her 527,000 Twitter followers for tipping her off about the role of a young Jean Grey in the upcoming X-Men: Apocalypse.

“I actually just started getting a ton of Tweets saying, ‘Oh, Sophie, they’re recasting Jean Grey as a young 18-year-old,’ and people just telling me to audition, so I emailed my agent and was like, ‘What’s going on with this?’ ” Turner tells PEOPLE exclusively.

“She was like, ‘Actually, they’re interested in you, so go for an audition.’ So I put myself on tape, got a callback, flew out to LA for the screen test and then I got it!”

Turner says she’s grateful for her social media buddies for keeping her abreast of all the breaking Hollywood news.

“That’s why I think it’s so important to have Twitter and to know what’s going on in the world,” Turner says. “Maybe my agent would have come to me and said, ‘You should do this,’ but that’s how I first found out about it.”

For more about Turner and how she was only 13 when she booked the pivotal role on Game of Thrones, pick up the next issue of PEOPLE, on newsstands Thursday.

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