An actress who appeared on "Entourage" has accused Jeremy Piven of sexual assault.

Ariana Bellamar tweeted to Piven on Monday, "'Member when you cornered me in your trailer on the #Entourage set? ‘Member grabbing my boobies on the [couch] without asking??"

She also tweeted, "'Member when I tried to leave; you grabbed me by the ass, looked at yourself in the mirror, & said what a ‘beautiful couple’ we made?"

The actress later clarified that Piven cornered her and "forcefully fondled my breasts & bum" on two occasions.

"Once at the [Playboy] mansion & once on [the 'Entourage'] set."

Piven has yet to respond to Bellamar's tweets and was interviewed by AOL's Build Series Tuesday morning but the allegations were not addressed. He did not return Fox News' request for comment. CBS, which airs his new series "Wisdom of the Crowd," says it's investigating a sexual harassment allegation against him, according to The Associated Press.

Piven is the latest name added to the growing list of actors accused of sexual assault or harassment following the allegations against movie mogul Harvey Weinstein.

Most recently, "House of Cards" actor Kevin Spacey was accused of molesting then 14-year-old actor Anthony Rapp. Spacey said he did not remember the incident that would have occured 30 years ago.

NBC contributor Mark Halperin and director James Toback have also been accused in recent weeks.