Sophie Turner has revealed social media trolls made her think about suicide "a lot" when she was younger as she admitted remarks posted online impacted her mental health.
The 23-year-old, who portrays Sansa Stark in HBO fantasy drama Game of Thrones, said she never considered taking her own life but described it as a "weird fascination".
Speaking to US talk show host Dr Phil on his podcast, Turner said: "It's weird. I say I wasn't very depressed when I was younger, but I used to think about suicide a lot when I was younger. I don't know why though.
"Maybe it's just a weird fascination I used to have, but yeah, I used to think about it. I don't think I ever would have gone through with it. I don't know."
Turner, who grew up in a large Edwardian house near Leamington Spa, said her anxiety over social media trolls progressed to the point she avoided leaving her home and seeing her friends.
She said she "would just believe" negative comments posted about her weight, skin and abilities as an actress.
"I had no motivation to do anything or go out. Even with my best friends, I wouldn't want to see them, I wouldn't want to go out and eat with them", she added.
Turner is now one of the world's most recognisable actresses thanks in part to Game Of Thrones and will star in Marvel superhero film Dark Phoenix in June.
She is engaged to the singer Joe Jonas and is expected to walk down the aisle later this year.
The eighth and final season of Game of Thrones began on Monday.