Sadie Sink explored character's dark side in The Whale

Sadie Sink explored character's dark side in The Whale

Sadie Sink explored the dark side of her character in 'The Whale'.

The 20-year-old actress plays the role of Ellie in Darren Aronofsky's Oscar-tipped film and says she was unable to decide if her alter ego was good or evil as she builds a relationship with her estranged father Charlie (Brendan Fraser).

When asked about her character's intentions, Sadie told The Hollywood Reporter: "I don't know, I think when I was filming, definitely for the earlier scenes, I had moments like where I was, 'Oh there's some real, real darkness in her.' You know there is, but I think it's just developed over time coming from this great deal of pain that she's in.

"And I think she has no idea who she is, she's very insecure, I think."

Sadie discussed the complex relationship between Ellie and Charlie and thinks that her character plays a "game" with her obese father in the film.

The 'Stranger Things' star said: "It's this game that she's become really good at playing that's kind of a challenge for Charlie, but the thing about him is that he's able to kind of see past all of it and I don't want to ensure her that there's a part of herself that he sees so clearly that I think is good, I think there's good in her."

Meanwhile, Sadie's performance in the movie impressed her co-star Brendan so much that he kept forgetting his lines.

The 54-year-old actor said: "The fluidity that Sadie plays, this beautiful, controlled rage, was breathtaking to me.

"I was constantly going up on my lines. And that's just because I have cobwebs upstairs and I was wearing a lot of gear, but also because I was just slack-jawed. I'm not joking.

"Watching her work — she won the game ball every day we worked, I'm telling you."