Lively is one of many famous faces who love the Aussie designer, with the likes of Beyoncé, Kendall Jenner and Chrissy Teigen all recently spotted in its signature feminine fabrics.
But before you start furiously searching the Zimmermann site, the brand revealed that the Tempest Ballet Dress isn't released until July.
Of course, being on a press tour means Lively wore more than just this glorious outfit.
The star is known for her many wardrobe changes and even joked about it on Instagram while debuting her second look: a floral Michael Kors dress.
But wait, there's more. For her final look of the day, Lively wore a Ralph Lauren pantsuit and sparkly Louboutins.
While three outfits in 24 hours might seem extreme to us mere mortals, it's actually a whole lot less than Lively wore for her last press tour, where she racked up a total of seven different changes in one day.