Actor Jeremy Piven has unequivocally denied accusations that he sexually harassed an actress on the set of HBO’s Entourage. Ariane Bellamar alleged Tuesday on Twitter that Piven cornered her in his on-set trailer, grabbing her breasts and buttocks without consent. “I tried to leave; you grabbed me by the ass, looked at yourself in the mirror, and said what a ‘beautiful couple’ we made,” she wrote before alleging a second incident at the Playboy Mansion. “I unequivocally deny the appalling allegations being peddled about me,” Piven wrote in a statement. “It did not happen. It takes a great deal of courage for victims to come forward with their histories, and my hope is that the allegations about me that didn’t happen, do not detract from stories that should be heard.” However, CBS, which houses his drama series Wisdom of the Crowd, and HBO, which played home to The Entourage, have said they are looking into the matter.