As summer comes to a close, memories of shopping for back to school staples may soon start flooding back. At the top of your nostalgic shopping list? The backpack, a student’s most quintessential carryall. Luckily, you don’t need a high-school I.D. to tout around one of these sacks come September. Brands like Chanel have lead the renaissance of making backpacks cool for adults, offering options in both oversized and logo-covered to the ultra-chic and quilted mini-bags. Celebrities were quick to get on board, topping of their outfits with the hands-free must-have. Cara Delevingne showed how to make hers red carpet friendly by pairing it with an all-black ensemble, as W September cover star Katy Perry topped off a sporty jersey-dress with violet piece by Chanel. Of course, there is still plenty of use for the utilitarian bags of our teenage years—Diane Kruger pairs her with a mini-dress and sneakers for an easy afternoon look, while Cate Blanchett opted for a sleek leather version to pair with her business casual look. Here, a look back at how celebrities have donned backpacks well beyond graduation.