Around 239MB in size, the update will automatically reach your smartphone. You can also manually check for the update by going to Settings < About Phone < Software updates.
It is important to note here that all updates are released in phases, so not everyone will get the update right-away and it might take days to appear on your device.
To remind you, Android 4.4 brings several UI improvements, cloud print support, better multi-tasking, and more.
We will update the post once we get hold of the OTA URLs.