I found two similar blazers (with limited sizes available) the first retails for $58 at Nordstrom and the second from Urban Outfitters retails for $78. Click either photo below to purchase.
Milla is wearing leggings, but because I think they are just as comfortable but offer you a little more substance in terms of fabric, I chose these BDG denim leggings instead. They retail for $39 and as always, click on the photo below to purchase/for more information.
To complete the rest of Milla's outfit on a budget, you'll need a loose fitting vneck tee, some flats (although since she's not wearing shoes in the photo it's open to interpretation, I also included sandals and boots for variety), and a silver necklace for $6.80 (click here to purchase).