They're tighter than Oprah and Gayle!

Michelle Williams and bestie Busy Philipps caught a flight out of LAX yesterday, and they're so close, they even hold hands!

They became pals after starring on Dawson's Creek back in the day, and have maintained their friendship over the years. In fact, the Oscar nominee recently confessed that their bond is stronger than any relationship.

"I’m so in love with her. She’s proof that the love of your life does not have to be a man! That’s the love of my life right there," she previously gushed to reporters about the mother-of-two.

The ladies attend the SAG awards together on Sunday, so we wonder where they're headed to next?!