'It's Always Sunny In Philadelphia' Crew Reveal Secret 'Hills' Love Affair

Charlize Theron may be still catching up on the rollercoaster antics of MTV's hit show "The Hills," but there's at least one show business gang out there that's totally down with Lauren, Heidi & Co. And it's probably not who you'd expect...

So that said, if you've been wondering what the "Always Sunny In Philadelphia" crew has been up to in their off-time (their fourth season premiered last night on FX), well here's your answer, straight from stars Charlie Day, Glenn Howerton and Rob McElhenney. Listen to them spills the beans on a hidden Hollywood relationship in the video below.