Psst: You Can Shop Reese Witherspoon's Exact Birthday Shirtdress

Whether it's predicting spring's trendiest color, sporting monochrome during the height of its popularity or touting royal-approved handbags, Reese Witherspoon is always on the pulse of fashion. And her birthday shirtdress is no exception.

On March 22, Witherspoon took to Instagram to thank all of her followers for their birthday wishes, sharing a photograph of herself from a photo shoot for her brand, Draper James. With a birthday-worthy frosted cake with pink sprinkles on the table next to her, The Morning Show star was all smiles while rocking the Isabella shirtdress ($158) in a soft baby blue with white pinstripes. She wore the outfit with simple gold hoops and a pair of blue lace-up woven wedges. The best part? It's still in stock!

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Made of 100 percent crisp cotton and spun with an oxford weave, the Isabella shirtdress features back darts and an attached wide belt that could be tied either in the front or back to switch up its look for both work and play—let's just say this long-sleeve dress is a mini with a mission. Plus, it comes in a pink candy striper-esque pattern that's on sale for 50 percent off.

Sophisticated, polished and oh-so chic, it's the perfect piece to take you from spring garden parties to work meetings and upscale dinners. The brand even recommends using the piece as a bathing suit cover-up, so you can pack it on your next vacation and be totally prepped for a day lounging by the pool. Fashionable and multi-functional? Yes, please! And if you're looking for some gorgeous lookalikes at different price points, I've got you covered below. Leave it to Reese to give us the gift of style inspo on her birthday!