Sophie Bush talks about Mark Schwann, allegations against him

Actor Sophia Bush has spoken in depth about facing sexual harassment at the hands of "One Tree Hill" creator Mark Schwann.

Bush, 35, detailed her experiences on Sirius XM's Andy Cohen Live, where she recalled how she had to hit Schwann when he groped her.

"The first time Mark Schwahn grabbed my a**, I hit him in front of six other producers, and I hit him f**king hard," Bush said, according to Entertainment Weekly.

"We knew about things he'd say to people, we knew about, like, the late-night texts, we knew when he was super-obsessed with one girl on our show that he started trying to bang down her hotel room door in the middle of the night. She had to be moved, her rooms were moved. And then her boyfriend came and stayed with her the next month and literally, like, it almost came to fisticuffs between the two of them," she added.

In November last year, Bush was one the many stars of the CW series, including actors Hilarie Burton and Bethany Joy Lenz, to release a joint statement in support of writer Audrey Wauchope, who alleged harassment from the 51-year-old creator.

A month later, Schwahn was fired from the TV drama "The Royals" following an investigation into the allegations against him.

Bush said the experience of working on the show for nine seasons was "wonderful" when Schwann was not around.

"We're not the only group of girls that's ever had a boss who was a pig. That show for us was very interesting because at times it was wonderful and at times it really wasn't. Our writers' room was in LA, so we had plenty of time where (Schwahn) wasn't on set."