# OnGraphStart(Playable)

> This function is called when the PlayableGraph that owns this PlayableBehaviour starts.

## Definition

* **Type:** Method
* **Namespace:** [UnityEngine.Playables](/engine/6000.6/script-reference/unityengine/playables.md)
* **Assembly:** UnityEngine.CoreModule

```csharp
public virtual void OnGraphStart(Playable playable)
```

### Parameters

**** (\[Playable]\(/engine/6000.6/script-reference/unityengine/playables/playable)): The [Playable](/engine/6000.6/script-reference/unityengine/playables/playable.md) that owns the current PlayableBehaviour.

### Remarks

OnGraphStart is called when the graph starts playing, or on the first invocation of [PlayableGraph.Evaluate](/engine/6000.6/script-reference/unityengine/playables/playablegraph/evaluate.md). Each call to OnGraphStart is paired with [PlayableBehaviour.OnGraphStop](/engine/6000.6/script-reference/unityengine/playables/playablebehaviour/ongraphstop.md).