United Kingdom, Dec. 29 -- Sadie Sink is "really grateful" she's kept her life private.

The 23-year-old actress - who is best known for playing Max Mayfield in Stranger Things - was always "resistant" to opening up about herself when she was younger and now she's pleased she did so because she thinks it makes her performances more believable.

She told Australia's ELLE magazine: "When I was younger, I thought maybe I needed to be more open about who I was because there's so much public interest.

"But I was always resistant, and now I'm really grateful because I'd rather people see me as Max than Sadie. If I can leave myself out of it, then I've done my job."

Sadie only joined Stranger Things in season two and initially worried about fi...