With the romantic comedy 'Going the Distance' hitting theaters Labor Day weekend and the star-studded 'Horrible Bosses' in production, Charlie Day only has two things to complain about -- his lack of sleep and his awkward naked introduction to 'Bosses' co-star Jennifer Aniston.

Yes, naked introduction to Aniston.

The two stars shot a sans-clothes scene together within minutes of meeting each other on their first day on 'Horrible Bosses.' Naturally, in a dentist's office.

"We were thrust into getting to know each other pretty quickly," Day tells PopEater. "We get naked in a dental office because she's a dentist and I'm the dental assistant."