US acress Mila Kunis in ‘Luckiest Girl Alive’ (Netflix)

Users of Netflix are providing cautionary statements to people who want to watch Luckiest Girl Alive.

The new movie, which is based on Jessica Knoll's 2015 novel of the same name, centers on Mila Kunis' protagonist character, 

who must deal with a traumatic incident from her past involving a horrific high school massacre.

Those who have seen the 18-certificate movie since it came out on Friday, October 7, are warning their Twitter followers that it contains "harrowing" sequences that some viewers could find upsetting.

One user said, "Netflix totally fumbled the ball by not putting a large trigger notice for Luckiest Girl Alive."

Another user said, "I was bamboozled by Netflix's description of Luckiest Girl Alive. No trigger warning, no heads up, no nothing."

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