A host of Aussies are taking part in the 2011 WWF Earth Hour event.
Ambassadors Cate Blanchett, Jamie Durie, Rebecca Gibney and Miranda Kerr are just a few of the familiar faces to switch off and have a get together by candlelight, or a quiet night with the lights and power off.
The Earth Hour WWF 2011 event is on 8.30pm on 26 March.