Suki Waterhouse was spotted out and about in London this week, wearing what's about to be our go-to outfit for fall. Taking her adorable dog for a stroll in the park, and then later meeting boyfriend Bradley Cooper for a romantic date, Suki just proved that classic staples like a blue and white striped button-down and a leather skirt will get some serious mileage in your wardrobe.

First things first -- this skirt is everything. It subtly incorporates three of fall's biggest trends (gray, leather, and fit-and-flare), yet will most likely remain timeless in your wardrobe for years to come. It's the kind of piece you can pair with anything and everything, from button-downs, to cable-knit sweaters, to silk tops. Possibly the best part is that it's from the Banana Republic Fall Collection, and is surprisingly affordable for the quality and price. You can bet we'll be snapping one up before Labor Day.

Suki paired her leather skirt with a Banana Republic's Striped Button Down, another classic basic from the Fall Collection. Stocking up on a few of these shirts will serve you well -- they're another kind of piece that you can pair with anything, and are insanely easy to thrown on and go.

Don't you love it when you can find some affordable fashion inspiration? Now, if only putting together the rest of our fall wardrobe could be this easy...