"Game of Thrones" season 4 will feature big changes for Stark sisters Arya and Sansa as they start growing up and coming into their own after the premiere. "Game of Thrones" season 4 spoilers reveal how Maisie Williams and Sophie Turner's characters will transform.

"Arya's really changing this year and I'm not sure people are going to like who she's becoming," Maisie Williams, who plays Arya in "Game of Thrones," said of her character to E! News. "She's turning a lot darker and she's not quite as fun as she used to be... It's a different Arya than we've seen before."

Wetpaint spoke to Sophie Turner, who plays Sansa Stark, at the Christian Siriano Fall/Winter 2014 Collection show during New York Fashion Week, and she teased what "Game of Thrones" season 4 will bring for her character.

"There's a kind of big evolution [for Sansa in Season 4]," Sophie dished. "She begins to kind of manipulate the people who have done wrong to her in her past. She becomes a powerhouse character but in a very subtle way. It's really good."

"I feel like I've been waiting for a moment where I can manipulate the people that have come before me, so it was like I had been waiting for it for so long. It was a release," she added.

And a bonus spoiler?

Sophie promised "shocking stuff" and "more deaths, of course, because it's Game of Thrones," when season 4 premieres April 6 on HBO.

We can't wait to see what challenges and surprises the Stark sisters will face this spring!