CBS is 'looking into' an allegation that Jeremy Piven groped an actress on the set of 'Entourage'

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Jeremy Piven.

• Jeremy Piven of CBS' "Wisdom of the Crowd" has been accused of sexual misconduct by reality TV actress Ariane Bellamar.
• Bellamar said Piven groped her on multiple occasions, including on the set of HBO's "Entourage."
• Piven has denied the allegations.
• CBS responded on Tuesday, saying it was "looking into the matter."

Jeremy Piven, the star of CBS' "Wisdom of the Crowd," is facing sexual misconduct allegations from reality TV actress Ariane Bellamar, who on Monday took to Twitter to accuse Piven of groping her on multiple occasions. 

A CBS spokesperson told Deadline on Tuesday that the network was "aware of the media reports" of the allegations, and "looking into the matter." 

CBS did not provide any additional information about its investigation. The network's Piven-led show, "Wisdom of the Crowd," began airing in October. 

Bellamar's accusations came in the form of the following three tweets on Monday, in which she alleges that Piven groped her on the set of HBO's "Entourage" and at the Playboy Mansion:

 In a statement given to The Hollywood Reporter on Tuesday evening, Piven denied the allegations.

"I unequivocally deny the appalling allegations being peddled about me. It did not happen," Piven said. "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."

HBO also issued the following response on Tuesday: 

"Today, via the press reports, is the first we are hearing about Ariane Bellamar's allegations concerning Jeremy Piven. Everyone at HBO and our productions is aware that zero tolerance for sexual harassment is our policy. Anyone experiencing an unsafe working environment has several avenues for making complaints that we take very seriously."