An organic light-emitting display and a method of manufacturing the display are disclosed. In one embodiment, the organic light-emitting display includes a thin film transistor comprising: i) a gate electrode, ii) an active layer electrically insulated from the gate electrode, iii) a source electrode and a drain electrode electrically insulated from the gate electrode, and contacting the active layer and iv) an insulating layer formed between i) the source and drain electrodes and ii) the active layer. The display further includes an organic light-emitting device electrically connected to the thin film transistor. In one embodiment, the source electrode comprises a first source electrode and a second source electrode that are separated from each other, and a third source electrode electrically connecting the first and second source electrodes. Moreover, the drain electrode comprises a first drain electrode and a second drain electrode that are separated from each other, and a third drain electrode electrically connecting the first and second drain electrodes.