The actor shut down the red carpet for the Jeanne du Barry screening in a periwinkle blue gown, paired with blue hair piled onto her head in a messy updo. Up close, you can see that this colorful hair takes on a few different shades of blue, which were added to her hair using L’Oréal Paris Colorista Spray in Pastel Blue.
Honestly, it’s going to be hard for any celebrity, even Mirren herself, to top this look. But we won’t mind seeing this blue hair again and again for the rest of the festival.
Get the look: