But as we all know, Mirren is a woman of many looks and styles. Yesterday she rounded out her week at the festival with this stunning multicoloured satin dress, adorned with charming hand-drawn children’s artwork of fish, houses, flowers and rainbows.
We’ve always adored Mirren’s playful side, but this may be our favourite wardrobe pick of hers yet!
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See the gorgeous photos below, and tell us: does this fashion choice bring out her best? And does it inspire you as much as it does us?