September 23rd is officially the first day of fall, but everyone knows that Labor Day weekend is what actually marks the end of summer. As we say farewell to the season of beach lounging and barbeques we say hello to pumpkin spice everything and sweater weather. Sometimes though, busting out some new wardrobe items doesn鈥檛 feel like quite enough of a change to celebrate the shift in seasons. But you know what is? A new hair 鈥榙o. And you know who just mastered the seasonal hairstyle change-up like a champ? Why, that award goes to Sienna Miller.

Sienna Miller Red Hair

The British style icon, who is typically known for her perfectly disheveled, blonde locks seems to have taken a queue from Amy Poehler with her latest trip to the salon. Miller was recently photographed at the Launch Party for English fashion brand Debenhams rocking a rich, auburn color. In classic It-girl fashion, the new 鈥榙o was styled with just the right amount of messiness.

The change in color is not quite as dramatic as the transformation Lily James recently debuted, but it鈥檚 still a noticeable difference. Paired with those coordinating mules she鈥檚 rocking, it seems as though Sienna really has the autumn look mastered. We can鈥檛 say we鈥檙e surprised though, she鈥檚 never been one to let us down in the style department.

How are you switching up your hair for fall? Share with us in the comments below.

(Photos via Danny E. Martindale/David M. Benett/Getty)