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Sienna Miller, Marlowe

Jackson Lee / Splash News

Sienna Miller and Marlowe are the sweetest shopping buddies! 

The 31-year-old fashionista and her adorable 7-month-old daughter were snapped on the streets of NYC after shopping in SoHo Tuesday afternoon. 

Tom Sturridge's fiancée looked hipster chic in boyfriend jeans, a gray sweater and leopard flats, carrying her best accessory—her darling daughter—in a baby sling as she hailed a cab. 

The blond beauty's bundle of joy practically killed us with cuteness, wearing her dark brown hair in a mini ponytail and sporting a puffy pink onesie to keep warm in the crisp New York weather. 

Sienna quickly became one of the most  stylish Hollywood moms after welcoming her first child with her hubby-to-be in July. 

And from the looks of the precious pair, the trendy mother is already passing down her impeccable taste to her little cutie pie!