Twenty years ago, Busy Philipps and Michelle Williams met on the set of "Dawson's Creek," and the rest is history: The two have been the epitome of graceful, compassionate and adorable friendship ever since. They cheer each other on from the crowd and support one another in their times of need -- Philipps has both dyed Williams' hair pink for her and flown across the county to be by her side on the 10th anniversary of Heath Ledger's death.
Today, Philipps penned a beautiful message to her longtime friend on Williams' 40th birthday, promising to cherish their bond until they're old and gray and sending her good wishes from afar.
The two often accompany each other to award shows and premieres, always looking picture perfect, so we're taking a trip through time and picking out our favorite red carpet moments. Vote your favorites to the top!