Find yourself in a fall wardrobe rut? Don't fret, dear readers, it happens to the best of us. It's easy to get lost in your long list of clothing and accessory must-haves (ours is never ending), and finding fresh ways to wear the season's trends can surely be a daunting task. In times like these, there's really only one thing to do: look to your favourite celebrity tastemakers for a little sartorial guidance. Of course, the initial outfit inspiration is really only half the battle; it's also nice to know exact details about said look and a few in-stock alternatives are helpful too! Happily you'll get all three components in this instalment of What Was She Wearing: Answers!, which features a quartet of fabulously fashionable ladies. So whether you're in the market for a bold pair of trousers per Blake Lively or perfect ankle boots à la Rachel Bilson, today's story has all the head-to-toe coverage you need to stay stylish this season!

Kate Bosworth
Whether she's dressed to the nines for an evening fete or sporting a cute and casual ensemble for an afternoon outing, Kate Bosworth consistently impresses you with her wardrobe choices, especially the adorable H&M Polka Dot Sweater ($25, 310.855.9683) she wore while shopping in Los Angles last month. The actress kept her look laidback by styling the pale pink knit with a pair of Current/Elliott's baggy Army Pants ($244, available here in Army) in Underwater and accessorizing with Mulberry's supremely functional Leah Messenger Bag ($895). While this exact shade is no longer available, this covetable carrier is currently in stock at in black, bright blue, and camel. Not quite in your budget? Urban Outfitters' Ecote Canvas Backpack ($68) or Coach's Studio Legacy Leather Backpack ($258) will certainly fit the bill. For a complete Bosworth-inspired look, head over to H&M for her exact oh-so sweet sweater, and wear it with a pair of slouchy pants like ASOS' Aged Vintage Peg Leg Jeans ($55). It's the perfect combination for running around town.

Rachel Bilson
When it comes to obsession-worthy ensembles, Rachel Bilson never fails to captivate, but lately you've been intrigued by one of her outfits in particular. The look we're referring to was photographed last month in Hollywood, when the darling dresser headed into Jimmy Kimmel Live! wearing Diane von Furstenberg's Roccoco Felted Jacket ($485) with Paige Skyline Ankle Peg Jeans ($189) in Tropics. (We particularly like the way she rolled them up for a more cropped look.) To keep extra warm on the chilly day, Bilson bundled up with a Salvatore Ferragamo leopard-print scarf, and then rounded out her look with a pair of grey 3.1 Phillip Lim booties and black socks. These outfit ingredients add up to one yummy fall ensemble, so be sure to cook up a similar look by pairing a jacket like Silence & Noise's Lurex Blazer ($78) with Forever 21's Eunice Frayed Jeans ($27). If you're looking to accomplish a true interpretation of Bilson's outfit, we suggest rolling up the jeans just above the ankle, and finishing off your outfit with Rosegold's Melly Suede Booties ($195) and Bop Basics' Gia Scarf ($108).

Kirsten Dunst
While Kirsten Dunst's daytime ensemble doesn't feel entirely fitting for fall's chilliest moments, it's still an excellent example of smart transitional wear. The talented actress--who will be starring alongside Ryan Gosling in the murder mystery All Good Things out next month--selected Alexa Chung for Madewell's Iris Blouse ($110) and Madewell's wool Midnight Blazer ($168) in True Black for an afternoon of shopping in Los Angeles a few weeks ago. Both of her selections are must-buys for autumn, so we suggest stocking up on both before they sell out! Dunst kept things leggy for the lower half of her look, opting for a pair of cutoff Levi's shorts and strappy caramel Acne wedges from the S/S 07 collection. And while her specific footwear selection is no longer available, Steve Madden's Bonndd Wedges ($70) have a likeminded look and will keep your feet comfortable and stylish all year long.

Blake Lively
What's not to love about Blake Lively's sartorial sensibilities? Our October Style Spotlight star is always impeccably turned out in eye-catching eveningwear, and her daytime looks are equally polished and put together. And much like her Gossip Girl character, Serena van der Woodsen, Lively's not afraid to make a bold fashion statement that captivates fans and fashion lovers alike. For example, you were drawn to the Topshop Animal Splodge Hareem Trousers ($80) Lively wore to an SNL after-party late last month. The cropped, print pants bring an exciting element of intrigue to her otherwise all-noir look. Of course no Lively outfit would be complete without a few seductive elements, which in this case are her sheer Rag & Bone top and Christian Louboutin Fastissima Ankle Boots ($995, available here in Misty Rose). If you have your heart set on recreating this after-hours ensemble, first you'll want to grab a black long-sleeve shirt. Some of our favourites include Kain's Cashmere V-Neck ($230) and Foreign Exchange's Sequin Net Top ($24). Now if the print of Lively's exact trousers doesn't suit your desires, Topshop offers up plenty of alternatives like the Bug Print Tapered Trousers ($80) and the Nouveau Peacock Hareems ($80). Finally, just add Vince Camuto's Alexia Ankle Boots ($125), which have a similarly sexy deep-v front as Lively's exact pick.--Jessica Baker

Photos of Kate Bosworth, Rachel Bilson, Kirsten Dunst, courtesy of X17; Photo of Blake Lively, courtesy of Bauer Griffin