An organic light-emitting diode (OLED) display is disclosed. In one aspect, the display includes a substrate, a switching transistor formed over the substrate, a driving transistor electrically connected to the switching transistor, and a pixel electrode electrically connected to the driving transistor. The display also includes a pixel definition layer covering the pixel electrode and having a pixel opening, an organic emission layer formed only in the pixel opening and connected to the pixel electrode, and a common electrode formed over the organic emission layer. The pixel definition layer is formed over the driving transistor.