Sean Penn ‘Doesn’t Care What People Think’ as Actor Admits to Using Ambien

While Sean Penn’s chain-smoking appearance on the Late Show with Stephen Colbert may have surprised fans this week, the actor isn’t concerned with the public’s reaction to him.
“Sean doesn’t care at all what people think,” a source tells PEOPLE. “He likes controversy and debate and doesn’t mind shocking people.”
While promoting his new novel Bob Honey Who Just Do Stuff, the 57-year-old actor smoked two cigarettes on-air and admitted