Porn star Kendall Karson reveals horrifying abuse at the hands of her ex-boyfriend.

David Garrett may be known as “the David Beckham of classical music” but his ex girlfriend, porn star Ashley Youdan, says he is an abusive pervert who once forced her to drink his urine.

Youdan, better known under the porn moniker Kendall Karson, is suing her the world-famous violinist for $12 million alleging mental and physical abuse in court papers.

The 28-year-old also claimed she broke a rib after Garrett, 35, pushed he into rough sex and also said he was a cocaine user who once tried to hire a sex slave.

“After seeing an advertisement for a ‘sex slave’ on the website Craigslist, [Garrett] responded to the advertisement hoping to perform ‘BDSM’ acts on the ‘sex slave’ and place the ‘sex slave’ in a cage while [he] and [Youdan] attended a nightclub,” the suit says, according to the New York Post.

The couple reportedly met in August 2014 when Garrett paid Youdan for sex.

He asked her to marry him just days later.

Ashley Youdan is better known under porn name Kendall Karson. Source: Instagram

They moved in together shortly afterwards and he urged her to give up her adult film career, which she claims she did.

It was Christmas Day of that year when Garrett's "behaviour began to take a dark turn for the worse," according to the suit, and on January 7 2015 he allegedly forced her to drink his urine.

On another occasion he also forced her into rough sex that left her with a fractured rib, the suit claims.

David Garrett is known as the "David Beckham of the classical music world". Source: Instagram

"Even I think this is awful, and I’m an expert in awful," said Youdan’s lawyer Eddie Hayes, who is a former Bronx homicide prosecutor.

He and his team will use voice recordings, photographs — including several which ate currently circulating go online showing Youdan exhibiting a bruised thigh — and medical records to prove her case.

Garrett's lawyer, Brian Maas, labelled the allegations "outrageous and baseless".

The pair broke up in February.