Hollywood actor Millie Bobby Brown is reportedly "taking action" against TikToker Hunter "Echo" Ecimovic after the TikToker claimed he committed sexual acts with the Stranger Things actor in a recent livestream.

“Mr. Ecimovic’s remarks on social media are not only dishonest but also are irresponsible, offensive and hateful,” the 17-year-old actor’s reps told TMZ on Tuesday. “Instead of engaging in a public discourse with him through the press or on social media, we are taking action to ensure that he stops this behaviour once and for all.”

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Ecimovic, 21, replied to a comment earlier this week in the livestream, which has been partially published on YouTube, that said, “Imagine being a grown adult and dating a kid” with “I know, I groomed her.”

The social media celebrity, who has 1.6 million TikTok followers, continued, “Everything that I did was completely legal and it was approved by everybody that I was with.”

The Tiktoker added, “How the f**k is there a lawsuit? Her mum and dad knew about everything." Complex speculates that Ecimovic was addressing a rumoured lawsuit against him filed by Brown's parents, as he claimed to have lived with the Netflix star at her home for eight months.

Ecimovic kissed Brown on the cheek in a picture, indicating that they were close at one point – however it is unknown when the photo was taken.

According to TMZ, law enforcement sources informed them that there are no active investigations into Echo at the moment.

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On Tuesday, though, the TikToker issued an apology on his platform, partially attributing his behaviour on his "getting more and more drunk."

“I said stuff that should have never been said,” he admitted in the lengthy apology.

Ecimovic concluded, “The livestream, I am sorry for. I’m not proud of at all how I spoke. It sounded very immature, looked horrible on my family, it looked horrible on me, it looked horrible on my friends … I should have ended it the moment it started getting bad.”

Jake Bongiovi, Jon Bon Jovi's son, seems to be the young actor's current boyfriend, as evidenced by a recent picture she posted on her Instagram story.