I absolutely love Reese Witherspoon's casual, California chic style. You can get a similar look with pieces from Forever 21, Target, Kohl's and other affordable stores. Chambray is huge this summer - you can find great dresses in styles that will flatter every figure or you can go with a chambray top and jeans or chambray skirt and crisp white top.
Reese's wedges and bag are from Chloe and they'll run you about $675. I couldn't find an exact match but these adorable wedges from Target are around $25 - right now if you spend $75 on select apparel and shoes at Target.com, get additional 20% Off + Free Shipping! You can also find the purse on the left at Target for $39 - it resembles the Chloe bag that Reese is carrying - you can see it on the left in black.