(AP Photo)

Don’t be fooled by “Entourage” star Adrian Grenier’s  persona as a ladies man onscreen, the actor actually has quite the sensitive side.

In fact, at the recent launch party for Verizon's “Droid” smartphone in New York, Grenier even shared some relationship advice with Fox411.

According to the 33-year-old star, the key to a relationship is listening.

So simple, and yet, so profound.

Grenier also told Fox411 that he isn’t the only actor on the HBO set who isn’t exactly like his character.

“I think it’s surprising that all the guys are relatively low-key and really sweet, not aggressive. They’re not as base and gross as some of the lines on the show allude to … they’re not as crude.”

Still, one star who does live up to a reputation as a man about town is Jeremy Piven.

“I think Jeremy is quite the ladies’ man,” Grenier said.