Cori Thomas, an American playwright, has come forward to accuse the Oscar-winning actor of inappropriate behaviour that she claims left her traumatised.
Variety released a shocking expose, with Thomas claiming she once spent a Sunday afternoon with Hoffman and his daughter Karina, a high-school classmate at the time, in downtown Manhattan.
'This was at first one of the greatest days of my life,' she told the publication. 'One of my idols was spending time with me and talking with me respectfully.'
According to the report, the tree ended up in a New York City hotel room, before his daughter Karina went to her mother's house. This was during the time Hoffman was in the midst of a divorce with his first wife, Anne Bryne.
Thomas alleges that after they were left alone, Hoffman left to take a shower and returned wearing only a towel, which he then dropped to the floor.
'He was standing there naked,' she alleges to Variety.
'It was the first time I had ever seen a naked man. I was mortified. I didn't know what to do. And he milked it. He milked the fact that he was naked. He stood there. He took his time.'
Hoffman, who would have been around 50 at the time, reportedly asked Thomas to massage his feet.
'What saved me was that the phone rang, and it was my mother downstairs to pick me up. So I left,' she tells.
Thomas continued, 'My mother always had some instinct that something untoward had happened. She kept asking me, and I was so mortified, I never said anything.'
Last month, Hoffman issued an apology over explosive allegations he sexually harassed a 17-year-old on the set of 1985 TV film Death of a Salesman. Writer Anna Graham Hunter claims the Oscar-winner asked her to give him a foot massage on her first day on set.