09/22/2010 AT 8:15 PM ET
” ]He’s sane and sorry.
More than a year after Joaquin Phoenix’s awkward appearance on the Late Show with David Letterman, the actor – clean-shaven and without sunglasses – returned to New York’s Ed Sullivan Theater on Wednesday to apologize for his behavior.
“I mean, I think that you’ve interviewed many, many people and I assumed that you would know the difference between a character and a real person,” he says about the now-infamous 2009 interview, in which a gum-chomping, mumbling Phoenix barely answered Letterman’s questions. “I hope I didn’t offend you in any way.”