And this is in addition to the $3 million he donated to the Oceana foundation back in February! Talk about putting his money where his mouth is ... and to the tune of $10 million?! Yet another reason why we love Leonardo DiCaprio...

Leo attended the final day of the Our Ocean Conference on Tuesday at the State Department in Washington, DC, and the 39-year-old actor pledged to donate $7 million to ocean conservation. This was the same day that it was revealed that President Barack Obama will significantly expand marine sanctuary protections in the Pacific Ocean.

“It’s the Wild West on the high seas,” Leo said at the conference. “These last remaining underwater bio gems are being destroyed because there isn’t proper enforcement or sufficient cooperation among governments to protect them. We’re plundering the ocean and its vital resources, and just because we can’t see the devastation from dry land doesn’t mean it’s any less dangerous. It needs to stop.”