Mckenna Grace thinks the internet is "very fickle".

The 20-year-old actress acknowledges that social media has changed the movie business, with Mckenna explaining that fans get "really sick of seeing people really fast".

The actress - who appears in The Hunger Games: Sunrise on the Reaping - told Cosmopolitan: "I'm just out here clawing my way through, trying to get jobs and do things I'm proud of.

"It's scary because unlike in the '90s or early 2000s -- where your favourite actors did the same thing in a bunch of movies --now with social media, people get really sick of seeing people really fast. It's like, 'This is the hot new commodity, the new face we've been wanting.' Three weeks later, everybody is hating on them."

Asked if she worries that will happen to her, Mckenna - who has more than five million Instagram followers - replied: "The internet is a big part of the industry but very fickle. There was a time where people wouldn't give you an interview because you had less than three million followers.

"Yet it's a catch-22 because if you're too present … but, hey, I'm just thankful to be here. And lately, I've been blessed to be able to do these franchises that I'm a huge fan of. I am the biggest Hunger Games fan."

Mckenna recently explained that her body was in "fight-or-flight mode" while shooting The Hunger Games: Sunrise on the Reaping.

The actress stars in the upcoming prequel to the beloved Hunger Games franchise, and Mckenna admits that the movie's shoot took a heavy toll on her.

Mckenna - who appears in the film alongside Jesse Plemons, Ralph Fiennes, Glenn Close, Kieran Culkin, Elle Fanning, and Maya Hawke - told People: "Whenever you're putting your body in fight-or-flight mode every day, your body can't tell the difference between the trauma of that and if you were really running for your life.

"So it's like you go home every day and your nerves are totally shot and you're out of your mind like, 'Oh my God, I almost died today.' And you're like, 'Yeah, I did do some dangerous stunts,' but it's more so the emotional impact of that."