Warning: Distressing content.

Ansel Elgort has taken to Instagram to deny claims he sexually assaulted a young woman.

It comes after a woman who identified herself as Gabby claims the star sexually assaulted her in 2014. She posted about the encounter on Twitter, alleging Elgort left her "sobbing and in pain".

The West Side Story actor posted on his Instagram profile that he believes the interaction was "legal and entirely consensual", Page Six reports.

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Elgort wrote that he was "distressed" to see the claims about his behaviour on social media.

"I cannot claim to understand Gabby's feelings but her description of events is not what happened."

However, the star did admit to his "relationship" with Gabby not ending well and apologised for how he acted.

"I stopped responding to her, which is an immature and cruel thing to do to someone," he wrote.

"As I look back on my attitude I am disgusted and deeply ashamed of the way I acted."

Gabby has appeared to have deactivated her Twitter account since posting her story on social media. Her post contained distressing details of the encounter.

She claimed that she told Elgort she was soon turning 17 when he shared his private Snapchat account with her. She also alleged that the actor shared nude photos of himself with her and shared screenshots of their messages to Twitter.

The young woman also alleged the actor asked her for a threesome along with one of her dancer friends who was "as well underage". She claimed she didn't tell anyone because Elgort told her it could "ruin his career".

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